ASE B6 Glossary

A

AcceleratorVehicle Construction: In a hybrid or electric vehicle, the accelerator pedal signals the powertrain control system to draw on the electric motor, high-voltage battery, or both to propel the vehicle - differing fundamentally from the throttle-cable or drive-by-wire system in a conventional internal combustion engine vehicle.
Access TimeEstimating: Access time is the labor time on a repair estimate that accounts for the additional work required to reach and remove damaged components - such as pushing, pulling, or cutting - that is not included in the standard removal and replacement times.
Accident ReportEstimating: An accident report is a written record of the facts surrounding a vehicle collision - including the parties involved, vehicle descriptions, damage observed, and incident conditions - used by insurance companies, repair shops, and legal parties during the claims and repair process.
Actual Cash Value (ACV)Estimating: The current market value of a vehicle, used to decide whether repairing it or declaring it a total loss makes financial sense.
Actual CostEstimating: The verified, documented total cost of a completed repair - supported by itemized invoices, parts receipts, material usage records, and photo or video documentation - representing what the repair actually required as opposed to what was originally estimated before the vehicle was disassembled.
Advanced High-Strength Steel (AHSS)Vehicle Construction: Advanced high-strength steel (AHSS) is a family of engineered steels -- including dual-phase, TRIP, complex phase, and martensitic types -- that replace conventional steel in modern vehicle structures to save weight while maintaining or improving crash strength.
AerodynamicsVehicle Construction: Aerodynamics in vehicle design is the study and measurement of how efficiently a vehicle's body shape moves through the air, minimizing wind resistance (drag) to improve fuel economy, high-speed stability, and overall performance.
AftermarketParts Identification and Sourcing: Non-OEM replacement parts manufactured by third-party suppliers; classified as certified (CAPA/NSF), non-certified, remanufactured, or recycled/LKQ - with important quality and application distinctions for structural versus cosmetic components.
Air Bag ControllerVehicle Systems Knowledge: The air bag controller analyzes inputs from the sensors to determine whether air bag deployment is needed.
Anti-seize CompoundVehicle Systems Knowledge: A metallic-paste thread lubricant (typically aluminum, copper, or nickel-based) applied to fastener threads before installation to prevent galvanic corrosion, galling, and thread seizure - ensuring the fastener can be removed without damage even after extended exposure to heat and corrosive environments.
AppreciationEstimating: In collision repair estimating, the increase in a vehicle's value or the owner's benefit derived from a repair or improvement - used in insurance contexts to evaluate whether a repair provides the vehicle owner with a condition better than pre-loss, which may affect betterment charges or total-loss determinations.
Arc FlashLegal and Environmental Practices: Arc flash is a sudden, high-energy electrical discharge hazard associated with high-voltage systems on hybrid and electric vehicles, capable of causing severe burns or injury.
Automotive Service Association (ASA)Legal and Environmental Practices: ASA is a national automotive service industry association, listed in the source material among the organizations serving the collision repair and automotive service trades.
Automotive Service Excellence (ASE)Damage Analysis: Automotive Service Excellence (ASE) is the national nonprofit organization that certifies automotive and collision repair technicians through standardized written examinations, with the goal of improving the quality and professionalism of vehicle service and repair across the industry.
Axle RatioVehicle Construction: The numerical relationship between driveshaft rotational speed and driven-wheel speed, calculated by dividing the ring gear tooth count by the pinion gear tooth count - a higher axle ratio (e.g., 4.11:1) multiplies torque more and accelerates better but reduces top speed and fuel economy compared to a lower ratio (e.g., 3.08:1).

B

BainiteVehicle Construction: Bainite is an iron microstructure phase, rich in silicon and carbon, used alongside ferrite and martensite in advanced high-strength steels like TRIP, complex phase, and martensitic steel.
Battery Electric Vehicle (BEV)Vehicle Construction: A battery electric vehicle (BEV) is a vehicle powered solely by one or more electric motors driven by energy stored in a rechargeable high-voltage battery pack, with no internal combustion engine of any kind, requiring specific collision repair protocols for high-voltage safety, structural differences, and ADAS calibration.
Belt Reminder SystemVehicle Systems Knowledge: A restraint system feature that uses sensors and a warning system -- typically a dashboard light and audible chime -- to remind vehicle occupants to fasten their seat belts.
Belt RetractorVehicle Systems Knowledge: A belt retractor is used to remove slack from a seat belt so it fits snugly against the occupant.
BettermentEstimating: The insurance estimating adjustment by which an insurer charges the vehicle owner a portion of a replacement part's cost when the new part provides a condition better than what existed at the time of loss - applied to wear items such as tires, batteries, brake pads, and shocks/struts.
Body ID NumberEstimating: The body ID number (also called the service part label or paint code label) is a factory-applied identification tag on the vehicle that contains the OEM paint code, interior and exterior color designations, and other trim information - essential for identifying the correct paint formula when refinishing.
Body TypeEstimating: Body type is the vehicle's structural configuration (such as sedan, coupe, or SUV), one of the specific pieces of information identified and recorded from VIN decoding during estimating.
Body-on-Frame (BOF)Vehicle Construction: A vehicle construction type where the body is mounted on a separate structural frame, typically requiring higher-output welding equipment due to the frame's heavier-gauge steel.
Body-Over-Frame ConstructionVehicle Construction: Body-over-frame construction is a vehicle design in which a separate, rigid steel frame (the chassis) carries all mechanical components and provides the primary structural strength, while the body - a separate shell providing the passenger compartment and exterior styling - is bolted on top through rubber body mounts.
Bolted Parts and AssembliesVehicle Construction: In collision repair estimating, the secondary components - wiring harnesses, brackets, relays, sensors, and mechanical hardware - that are physically attached to a primary damaged panel or assembly and must be transferred, repositioned, or reinstalled as part of the panel repair or replacement procedure.

C

Caged PlateVehicle Systems Knowledge: A caged plate is a heavy, thick steel plate with threaded holes that accept large bolts.
California Air Resources Board (CARB)Legal and Environmental Practices: California's state environmental agency that regulates vehicle and refinish-product emissions, working alongside the federal EPA.
CAPAParts Identification and Sourcing: The Certified Automotive Parts Association - the independent testing and certification organization that evaluates aftermarket collision repair parts for fit, finish, material quality, and safety equivalency to OEM parts, and affixes a CAPA-seal label to parts that pass its certification standard.
CarcinogensShop Practices: Carcinogens are cancer-causing agents.
Cartridge Filter RespiratorShop Practices: A cartridge filter respirator protects against vapors and spray mists given off by one-part enamels or lacquers, and is used in well-ventilated areas.
Certified Crash TestDamage Analysis: A certified crash test is a standardized, instrumented vehicle impact test conducted by regulatory agencies (NHTSA) or independent safety organizations (IIHS) using sensor-equipped crash test dummies to objectively measure occupant injury potential and evaluate vehicle structural crashworthiness.
ChassisVehicle Construction: The chassis is the frame, engine, suspension system, and other mechanical parts with the body removed -- an assembly of mechanisms making up a major operating system of a vehicle.
Check ValveVehicle Systems Knowledge: A device that allows air or fluid to flow in only one direction, blocking any flow attempting to reverse back through it.
Chlorofluorocarbon (CFC)Vehicle Systems Knowledge: An obsolete, ozone-depleting refrigerant class (such as R-12) no longer used in modern vehicles.
ClaimantEstimating: A claimant is a person who files a claim.
Claims HandlingCustomer Relations and Sales Skills: Claims handling is the set of basic insurance claim procedures a shop representative recognizes and explains to a customer or client during the repair process.
Clean Air ActLegal and Environmental Practices: The federal law that prohibits venting refrigerant into the atmosphere and requires certified recovery equipment before opening any charged A/C component.
Clean-upParts Identification and Sourcing: The labor operation of repairing minor damage, rust, or corrosion on a salvage (used) replacement part before it can be installed on the repair vehicle - an estimate line item that accounts for the additional work required to bring the salvaged part to an acceptable condition.
Clips and HardwareEstimating: The miscellaneous fasteners, retaining clips, push-in rivets, and trim attachment hardware used to secure body moldings, trim strips, door panels, and exterior accessories - often single-use items that break during disassembly and must be replaced, appearing as individual line items in collision repair estimates.
CollisionDamage Analysis: A collision is the violent impact between a vehicle and another object - another vehicle, a fixed object, or a pedestrian - that transfers kinetic energy into the vehicle structure, causing deformation, displacement, or fracture of body, structural, and mechanical components.
Collision Access TimeEstimating: The labor time in a collision repair estimate allocated for removing structural stress, releasing jammed panels, or performing preliminary straightening required before normal disassembly and repair procedures can begin - an additional line item that accounts for damage-induced access difficulties not included in standard R&I times.
Collision Estimating GuidesEstimating: Collision estimating guides are published databases - available in print and computer-based formats - that provide labor time allowances (in tenths of hours) for replacing or repairing vehicle body parts, OEM part list prices, and repair procedure notes used by estimators and insurers to calculate damage repair costs.
Collision RepairCustomer Relations and Sales Skills: Collision repair is the trade of restoring a vehicle that has been damaged in an accident back to its pre-accident condition, structurally, mechanically, and cosmetically; also called auto body repair.
Collision Repair CenterDamage Analysis: A collision repair center is a professionally equipped facility staffed by trained technicians that diagnoses, repairs, and refinishes collision-damaged vehicles - following OEM procedures, insurance requirements, and quality control processes to restore vehicles to pre-accident structural, mechanical, cosmetic, and safety condition.
Collision Repair FacilityCustomer Relations and Sales Skills: A collision repair facility is a business staffed with trained technicians and equipped with the specialized tools needed to restore accident-damaged vehicles; also called a body shop.
Collision Repair ProceduresDamage Analysis: Collision repair procedures are the sequential, standardized steps - from initial damage analysis and blueprinting through disassembly, structural repair, body work, refinishing, reassembly, and quality control - that a collision repair technician follows to restore a damaged vehicle to its pre-accident condition in compliance with OEM repair specifications.
Combination PliersVehicle Systems Knowledge: Combination pliers are the most common type of pliers, with both flat and curved gripping surfaces and two jaw-opening positions.
ComebackDamage Analysis: A comeback is a vehicle returned to the collision repair center after delivery because the customer has identified a repair-related defect - representing a direct quality failure that costs the shop rework labor, repair materials, customer dissatisfaction, and potential loss of future business.
Complex Phase (CP) SteelVehicle Construction: Complex phase (CP) steel is an advanced high-strength steel made primarily of ferrite and bainite with added elements like titanium and columbium, giving it higher tensile strength than dual-phase steel.
Composite UnibodyVehicle Construction: A composite unibody (space frame) is a vehicle structural architecture built from non-steel materials - aluminum, carbon fiber, fiberglass, or combinations thereof - bonded, riveted, or adhesive-joined into a lightweight integrated structure that replaces the traditional steel stamped unibody.
Compressed Natural Gas (CNG)Vehicle Systems Knowledge: Compressed natural gas is natural gas stored at up to 10,000 psi on a vehicle to provide a source of clean-burning fuel for an engine.
Computer Based Testing (CBT)Legal and Environmental Practices: Computer Based Testing, or CBT, is the delivery of the certification test on a computer rather than on paper, with the advantage that the candidate receives test results immediately.
Computer DatabaseEstimating: A collision repair center computer database is the electronic repository - integrated with estimating software - that stores and provides real-time access to OEM part prices, labor time allowances, repair procedure notes, and vendor information for all makes and models, enabling fast and accurate damage estimate preparation.
Computer-Based EstimatingEstimating: Computer-based estimating is the use of specialized software (CCC ONE, Mitchell, Audatex) to prepare vehicle damage repair estimates - automating the lookup of part prices, labor times, and repair procedure notes while calculating totals, generating printed estimates, and transmitting estimate data electronically to insurers.
Constructive Total LossEstimating: The insurance-industry determination that a damaged vehicle will be declared a total loss based on the combined sum of repair costs plus ancillary claim expenses - including rental reimbursement, diminished value settlements, and storage fees - exceeding the vehicle's actual cash value (ACV), even when the repair cost alone might fall below the total-loss threshold.
Contractual and Warranty ObligationsLegal and Environmental Practices: Contractual and warranty obligations are the legal commitments a shop must recognize and honor, arising from repair contracts with customers and from manufacturer or shop warranty terms.
Conversion ChartEstimating: A conversion chart is a reference table used in collision repair estimating to convert labor time units (tenths of hours from the estimating guide) into dollar amounts at the shop's established labor rate, enabling manual calculation of labor charges without computerized estimating software.
Cooperative Education ProgramsCustomer Relations and Sales Skills: A cooperative education program is a school-sponsored arrangement that lets a student work a real job in the trade while simultaneously earning school credit toward their program of study.
Corrosion PreventionLegal and Environmental Practices: Corrosion prevention in collision repair is the systematic restoration of all factory-applied anti-corrosion materials and coatings - epoxy primer, weld-through primer, seam sealers, underbody coatings, and cavity wax - to any area where bare metal was exposed during structural or body repair.
Crush ZonesVehicle Construction: Crush zones are engineered sections of a vehicle's frame or body structure designed to progressively collapse in a collision, absorbing impact energy so less of it reaches the occupant compartment.
Curtain Air BagVehicle Systems Knowledge: A curtain air bag deploys from the front pillar and roof trim.
Customer Request (C/R)Estimating: An estimate/repair-order designation marking a line item as added at the customer's request, rather than as insurance-covered collision damage.

D

DamageDamage Analysis: Indirect (secondary) damage caused by collision energy transferring through the vehicle's structure, producing stress in the suspension and/or body dimensions in areas away from the primary point of impact.
Damage Analysis FormDamage Analysis: A damage analysis form helps organize specifications, actual measurements, and the differences between correct and actual measurements.
Damage EstimateDamage Analysis: A damage estimate (also called a damage appraisal) is the written document itemizing every part to be replaced or repaired, its cost, and the labor time for each operation required to restore a collision-damaged vehicle - forming the contractual basis for the repair authorization between the shop, the customer, and the insurer.
Damage ReportEstimating: The formal written document - also called an estimate or appraisal - that identifies all collision damage, specifies required repair operations, and establishes the authorized cost of the repair based on industry reference systems.
Dash AssemblyVehicle Construction: The dash assembly (instrument panel) is the interior component spanning the full width of the vehicle that houses the instrument cluster, infotainment system, climate controls, airbag module, and associated wiring - a major assembly that must be removed for structural repairs and airbag service after significant frontal collision.
Dash PanelVehicle Construction: The dash panel (firewall or front bulkhead) is the structural sheet metal partition separating the engine compartment from the passenger compartment - a critical structural component that resists frontal collision intrusion, provides mounting for the cross-car beam, and seals the cabin from engine heat, fumes, and fire.
DatabaseEstimating: The comprehensive reference system - available as software or published books - containing OEM and aftermarket part numbers, current part prices, and standardized labor time allowances for every collision repair operation, used as the foundation for writing accurate, defensible estimates.
Dealership Body ShopCustomer Relations and Sales Skills: A dealership body shop is a collision repair facility that operates under the ownership and management of a new car dealership, typically specializing in that dealership's brand(s).
Dealership Collision CenterDamage Analysis: A dealership collision center is a body shop owned and operated by a franchised vehicle dealership that provides OEM-aligned repairs for the dealership's vehicle brand - offering direct access to OEM parts inventory, factory repair information, and brand-specific diagnostic equipment.
Deductible ClauseEstimating: A deductible clause is the provision in a vehicle insurance policy that requires the policy holder to pay a specified initial amount of any covered repair claim - typically $250 to $1,000 - before the insurance company pays the remaining balance to the collision repair center.
Direct Repair Program (DRP)Customer Relations and Sales Skills: A contractual business arrangement between an insurance company and a collision repair facility in which the shop agrees to follow the insurer's repair guidelines, price schedules, and quality standards in exchange for customer referrals - becoming a 'preferred provider' to the insurer's policyholders.
Dual-Phase (DP) SteelVehicle Construction: Dual-phase (DP) steel is an advanced high-strength steel made of two iron phases -- softer ferrite and harder martensite -- combined to balance strength with formability.

E

Electric Vehicle (EV)Vehicle Construction: An electric vehicle (EV) is a vehicle propelled entirely by one or more electric motors powered by a high-voltage rechargeable battery pack, with no internal combustion engine for propulsion, requiring specialized collision repair safety protocols due to the high-voltage electrical system.
EMF (Electromagnetic Field)Legal and Environmental Practices: EMF (electromagnetic field) exposure is a recognized hazard associated with high-voltage hybrid and electric vehicle systems, alongside electrocution, fire, explosion, and arc flash.
Emission Control SystemVehicle Systems Knowledge: The emission control system is the collection of vehicle components and devices required by federal law to limit harmful exhaust emissions; collision repair technicians are legally responsible for restoring these systems to their original factory condition after repairs.
EngineVehicle Construction: The engine provides the energy to move the vehicle and power all its accessories.
Engine TypeEstimating: Engine type is the specific engine configuration installed in a vehicle, one of the specific pieces of information decoded from the VIN during estimating.
Environmental Protection Agency (EPA)Legal and Environmental Practices: The Environmental Protection Agency (EPA) is the U.S. federal regulatory agency established in 1970 that sets and enforces environmental laws governing air quality, hazardous waste, water quality, and toxic substances - with significant impact on automotive collision repair shops through VOC emission limits, hazardous waste disposal requirements, and spray booth regulations.
Environmental SafetyLegal and Environmental Practices: Environmental safety is the set of procedures that protect people and the environment.
Estimating Guide Headnotes and FootnotesEstimating: Estimating guide headnotes and footnotes are the explanatory notes printed at the top and bottom of estimating guide procedure pages that clarify how to correctly apply the guide's labor times and procedures.
Estimating ProgramEstimating: An estimating program is computer software that automates the collision repair estimation process by accessing a database of parts pricing and labor times to calculate total repair costs.
Estimating SequenceEstimating: Estimating sequence is the correct step-by-step order in which repair operations and charges are determined and applied on a damage estimate.
Estimating SoftwareEstimating: Estimating software is a computer application that guides the collision repair estimator through the damage documentation process, automatically calculating refinishing allowances, labor adjustments, and optional equipment factors to produce a professional repair estimate.
EstimatorEstimating: The estimator is the collision repair professional responsible for inspecting damaged vehicles, determining the repair scope, and preparing the written damage report that guides the entire repair process.
Event Data Recorder (EDR)Legal and Environmental Practices: A vehicle module, often called the vehicle's black box, that records data about a crash event; by law its data belongs to the vehicle owner and generally requires their consent to access.
ExtensionsVehicle Systems Knowledge: A socket extension is a straight bar that connects between a ratchet handle and a socket to provide the reach needed to access recessed or obstructed fasteners.

F

Fastened PartsVehicle Systems Knowledge: Fastened parts are parts held onto a vehicle by bolts, nuts, screws, clips, and adhesives.
FastenersVehicle Systems Knowledge: Fasteners are the mechanical and adhesive devices - including bolts, nuts, screws, clips, and structural adhesives - that secure every component of a vehicle to the body, frame, and chassis.
Federal Motor Vehicle Safety Standard (FMVSS)Legal and Environmental Practices: The set of federal standards that test and regulate vehicle safety performance, including how OEM glass and structural components perform in a crash.
FerriteVehicle Construction: Ferrite is common iron in its softer, room-temperature phase, used as a base component in advanced high-strength steels and known for being relatively easy to bend.
Fixed PricingEstimating: Fixed pricing is standard pricing for performing a service or repair that does not change.
Flasher UnitVehicle Systems Knowledge: An electrical device that interrupts and restores current to the turn signal and hazard warning lights, producing their flashing on-off pattern.
Floor TunnelVehicle Construction: The floor tunnel is the raised hump running down the center of the floor pan in front-engine, rear-wheel-drive vehicles that creates a housing space for the driveshaft running beneath the passenger compartment.
Flow DiagramDamage Analysis: A flow diagram is a visual, step-by-step decision chart used in collision repair and service information to guide technicians through a logical sequence of diagnostic checks or repair procedure steps.
Full FrameVehicle Construction: The body-on-frame (BOF) vehicle construction design in which a separate, rigid steel ladder-type frame carries all powertrain, suspension, and structural loads - with the passenger compartment body bolted to the frame through rubber body mounts as a distinct unit - used today primarily in full-size trucks, commercial vehicles, and truck-based SUVs.

G

Gross Vehicle Weight Rating (GVWR)Vehicle Construction: The manufacturer-specified maximum total weight a vehicle is rated to safely carry, including its own weight, cargo, and passengers.

H

Head-On CollisionDamage Analysis: A head-on collision occurs when two vehicles traveling in opposite directions strike each other front-to-front, combining the speed of both vehicles into the total impact force and typically producing the most severe structural damage.
Heater CoreVehicle Systems Knowledge: The heater core is a small radiator located under the dash, used to warm the passenger compartment.
High-Strength, Low-Alloy (HSLA) SteelVehicle Construction: A category of steel stronger than conventional mild (low-carbon) steel, achieved by adding small percentages of alloying elements (manganese, silicon, niobium, vanadium, or titanium) that increase yield strength to 50,000-80,000 psi - used in automotive body panels, roof structures, door rings, and rails where weight reduction and structural performance are balanced.
Hydrogen Fuel Cell Vehicle (HFCV)Vehicle Construction: A hydrogen fuel cell vehicle (HFCV) is an alternative-fuel electric vehicle that generates its electricity through a chemical reaction between stored compressed hydrogen and atmospheric oxygen in a fuel cell stack, emitting only water vapor as exhaust.

I

I-CAR (Inter-Industry Conference on Auto Collision Repair)Legal and Environmental Practices: The collision industry's primary not-for-profit training and certification organization, whose Gold Class and role-specific programs define baseline technical competency for technicians, estimators, and shop owners across the collision repair industry.
ImpactDamage Analysis: An impact is the collision force applied to a vehicle when it is struck by or strikes another vehicle or object, initiating the energy transfer that causes structural damage requiring analysis and repair.
Impact SensorsVehicle Systems Knowledge: Impact sensors are the first sensors to detect a collision, because they are often mounted at the front of a vehicle.
Impervious GlovesShop Practices: Impervious gloves are latex or synthetic rubber gloves worn to prevent skin exposure when working with harmful chemicals.
Included OperationsEstimating: The labor tasks that estimating database publishers have determined are already accounted for within a primary operation's published time - tasks that are always performed as part of a larger operation and therefore should not appear as separate billable line items in the estimate.
Independent Body ShopCustomer Relations and Sales Skills: An independent body shop is a collision repair facility owned and run by a private individual, with no affiliation to a dealership, manufacturer, or larger shop chain.
Independent Collision CenterCustomer Relations and Sales Skills: An independent collision center is a privately owned and operated body shop with no corporate affiliation or franchise relationship, competing for business based on reputation, quality, and customer service within its local market.
Indirect DamageDamage Analysis: Indirect damage is damage that occurs away from the point of impact, transmitted through the vehicle's structure as impact force travels outward from where it was applied.
Inertia DamageDamage Analysis: Inertia damage is damage caused by a component's own momentum continuing to move during a collision, even though that component was never directly struck.
Insurance Institute for Highway Safety (IIHS)Legal and Environmental Practices: An independent vehicle safety rating organization whose testing standards (such as for roof strength) are separate from and different than NHTSA's.
Insurance Rating SystemDamage Analysis: The insurance rating system is a standardized numeric scale from -5 to +5 that evaluates vehicles based on how well they withstand a controlled partial barrier frontal crash test and how costly the resulting damage is to repair.
International Autobody Congress And Exposition (NACE)Legal and Environmental Practices: NACE is the International Autobody Congress and Exposition, the collision repair industry's trade event, named in the source material alongside I-CAR and the industry trade associations.
International System Of Units (SI)Vehicle Systems Knowledge: SI stands for the International System of Units, and the letters SI are the marking that identifies metric threads, which come in both coarse and fine.
ISOLegal and Environmental Practices: The International Organization for Standardization - an independent international body that publishes technical standards adopted by industries worldwide, including automotive manufacturing quality, environmental management, and repair procedure specifications.

J

Job OverlapEstimating: Job overlap is an estimating concept in which replacing two adjacent or connected components together requires less total labor than replacing each individually, because shared disassembly and assembly operations only need to be performed once.

K

Knee DiverterVehicle Systems Knowledge: A knee diverter cushions the driver's knees from impact and helps prevent the driver from sliding under the air bag and seat belt.

L

Lane Departure Prevention (LDP)Vehicle Systems Knowledge: Lane departure prevention (LDP) is an active ADAS function that automatically intervenes through the electric power steering motor or individual brake application to steer the vehicle back within lane boundaries when the driver fails to respond to lane departure warnings.
Lane Departure Warning (LDW)Vehicle Systems Knowledge: Lane departure warning (LDW) is a passive ADAS safety system that uses a rearview-mirror-mounted camera to monitor lane markings and alerts the driver with audible, visual, or haptic warnings when the vehicle drifts toward or over a lane boundary.
Lidar (Light Detection and Ranging)Vehicle Systems Knowledge: Lidar (Light Detection And Ranging) is an ADAS sensor technology that uses pulsed laser light instead of radio waves to detect and measure the distance, shape, and speed of objects in the vehicle's path, generating detailed 3D images of the surrounding environment.
Like Kind and Quality (LKQ)Parts Identification and Sourcing: The insurance and collision repair standard specifying that a replacement part must match the damaged part in type, quality, fit, and function - a contractual obligation ensuring the repair restores the vehicle to its pre-loss condition without degrading its performance, safety, or appearance.
Liquid Petroleum Gas (LPG)Vehicle Construction: Liquid petroleum gas (LPG) is a compressed alternative fuel composed primarily of propane stored in pressurized tanks on alternative-fuel vehicles, used in fleet applications where dedicated refueling infrastructure is available.
Lockout/Tagout (LOTO)Shop Practices: A safety procedure that physically disables and labels energized equipment (from a high-voltage vehicle system to shop machinery or an electrical breaker) to prevent it from being energized while a technician is servicing it.
Longitudinal EngineVehicle Construction: A longitudinal engine is an engine orientation in which the crankshaft axis runs front-to-back in the vehicle, used in front-engine rear-wheel drive (FR) and some front-engine all-wheel drive configurations.

M

Major Body DamageDamage Analysis: Major body damage is structural-level collision damage requiring replacement, welding, and straightening of large body components before the vehicle can be refinished, as opposed to minor cosmetic damage limited to the outer skin.
MartensiteVehicle Construction: Martensite is a hard, rigid phase of iron, stronger than conventional steel, used as a strengthening component within advanced high-strength steels like dual-phase and martensitic steel.
Mil GaugeEstimating: A mil gauge is a paint film thickness measurement instrument that measures the total coating thickness on a metal panel in thousandths of an inch (mils) or micrometers, used during estimating to detect previous repairs and during refinishing to verify correct film build.
Mild HybridVehicle Construction: A mild hybrid is a parallel hybrid vehicle in which the electric motor-generator assists the gasoline engine during acceleration and performs auto-stop/start functions but cannot propel the vehicle independently without the gasoline engine running.
Motor MountsVehicle Construction: Motor mounts prevent minor engine vibrations and noise from being transferred into the body.

N

Nation of OriginEstimating: Nation of origin is the country where a vehicle was manufactured, one of the specific pieces of information decoded from the Vehicle Identification Number (VIN) during estimating.
National Auto Glass Specifications (NAGS)Estimating: A separate glass pricing and parts specification guide used to look up glass part numbers and prices, distinct from the general collision estimating guide.
National Automobile Dealers Association (NADA)Estimating: A widely used vehicle value guide (alongside Kelley Blue Book) used to look up a vehicle's market value for total-loss and estimating decisions.
National Automotive Technicians Education Foundation (NATEF)Legal and Environmental Practices: NATEF is the nonprofit foundation created to evaluate automotive training programs and formally recognize the ones that meet its standards.
National Emission Standards for Hazardous Air Pollutants (NESHAP)Legal and Environmental Practices: The federal National Rule that sets the minimum VOC and application-technique requirements every automotive refinishing facility in the U.S. must meet.
National Highway Traffic Safety Administration (NHTSA)Legal and Environmental Practices: The federal agency that sets and regulates motor vehicle safety standards.
National Institute For Automotive Service Excellence (NIASE)Legal and Environmental Practices: NIASE is the original name of the certifying body that later shortened its name to ASE -- the organization that writes and administers the automotive technician certification tests.
Negotiation SkillsCustomer Relations and Sales Skills: Negotiation skills, in a collision repair context, are the communication techniques used to reach a mutual agreement with a customer or client over the repair estimate or claim.
New Car Assessment Program (NCAP)Damage Analysis: The New Car Assessment Program (NCAP) is the NHTSA (National Highway Traffic Safety Administration) program that conducts standardized crash tests on new passenger vehicles and rates their occupant protection performance on a 5-star scale, published as a consumer information resource.
Non-Included OperationsEstimating: Non-included operations are repair procedures or labor items that are not automatically covered within a standard estimating guide labor time, requiring their own separate price, charge, or fee.
Not-included OperationsEstimating: The labor operations that estimating database publishers have determined are NOT accounted for in a primary operation's published time - tasks that must be added as separate, billable line items in the estimate because the base published time does not include them.

O

Original Equipment Manufacturer (OEM)Parts Identification and Sourcing: The company that designed and originally manufactured the vehicle and its factory-installed components - the OEM standard is used throughout collision repair as the baseline for fit, finish, materials, and part specifications against which all repair work and replacement parts are evaluated.
Out-of-Service TimeCustomer Relations and Sales Skills: Out-of-service time is the estimated duration a vehicle will be unavailable to its owner during repair, which a shop representative must estimate and explain to the customer.
Outside Diameter (OD)Vehicle Systems Knowledge: A measurement of an object's diameter taken across its outer edge, commonly used to identify and match parts such as tubing, bushings, and fasteners.
OverhaulEstimating: The estimating operation type requiring complete disassembly, cleaning, visual inspection, part replacement as needed, reassembly, and reinstallation of an assembly - more extensive than a remove-and-install or remove-and-replace because it includes full internal servicing; indicated in the labor database with the code 'IOH.'
OverlapEstimating: The elimination of duplicate labor time in an estimate when two or more damaged operations share a common task - a deduction applied so the customer and insurer are not billed twice for work that is performed only once because a larger operation already accounts for it.
Overlap DeductionsEstimating: Overlap deductions are reductions applied to an estimate to avoid double-charging for labor or operations that are shared between two or more repair procedures on the same vehicle.

P

Paint and Refinish MaterialsGeneral Trade Terms: The consumable refinishing supplies line item in a collision repair estimate - covering all paint products, solvents, sandpaper, masking materials, fillers, and shop supplies purchased and consumed for the specific repair job - billed either as a flat-rate per job or calculated as a percentage of the refinish labor charge.
PanelParts Identification and Sourcing: A panel is a large plastic or metal body part -- a fender, hood, or roof, for example -- that forms part of the vehicle's outer body.
Parts Exchange New (PXN)Estimating: Parts Exchange New, or PXN, is an Audatex parts service that provides an electronic link out of the Audatex estimating system for sourcing new parts.
Parts Interchange GuideParts Identification and Sourcing: A parts interchange guide is a reference tool that identifies which vehicle models from the same manufacturer share common components, enabling technicians and estimators to source compatible used or salvage parts.
Passenger Side Air BagVehicle Systems Knowledge: The passenger side air bag deploys from behind a small door in the right side of the dash.
PathogensShop Practices: Pathogens are microorganisms that can cause illness and disease.
Personal Protection Equipment (PPE)General Trade Terms: The complete set of protective gear -- respirators, eye and face protection, gloves, and protective clothing -- that a collision repair technician wears to prevent injury while servicing vehicles.
Point of ImpactDamage Analysis: Point of impact is the specific location on a vehicle where a collision force was first applied, used as the starting reference for tracing how damage spread through the structure.
Pre-Existing DamageDamage Analysis: Pre-existing damage is damage present on a vehicle from before the collision being evaluated, which must be identified and recorded separately so it isn't mistakenly included in the current repair estimate.
Procedure PagesEstimating: Procedure pages are the reference section in a collision estimating guide that explains how to use the guide, defines its symbols and terms, and specifies what labor operations are included or excluded from published labor times.
Production DateEstimating: Production date is the vehicle's build date, one of the specific pieces of information decoded from the VIN during estimating, used to confirm the exact specification of parts and procedures that apply.
ProductivityEstimating: Productivity in the collision repair trade is a measure of the volume of quality repair work a technician or shop completes, directly affecting technician earnings and shop profitability.
ProfessionalCustomer Relations and Sales Skills: A professional, in the collision repair trade, is a worker who combines a broad technical skill set with workplace conduct - following instructions reliably and taking pride in the quality of their work.
Propellant ChargeVehicle Systems Knowledge: The propellant charge burns to produce the gas expansion that inflates an air bag.

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QualityCustomer Relations and Sales Skills: Quality, in a shop context, means performing every step of a repair correctly so the finished job is strong, reliable, and attractive -- balanced against productivity rather than traded off against it.

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ReattachEstimating: An estimating operation type in which a part that has been fully detached from the vehicle (fallen off, become dislodged, or been previously removed) is reinstalled - without the full remove-and-reinstall labor of a standard R&I, because the disassembly step has already been performed (either by the collision or a previous operation).
Recycled AssembliesParts Identification and Sourcing: Recycled assemblies are undamaged parts taken from another damaged vehicle and used for repairs.
Recycled PartsParts Identification and Sourcing: Recycled parts are used parts in good condition, salvaged from wrecked vehicles at salvage yards rather than manufactured new.
Regulatory ObligationsLegal and Environmental Practices: Regulatory obligations are the federal, state, and local legal requirements a collision repair facility must recognize and follow in the course of doing repair work.
ReliabilityCustomer Relations and Sales Skills: Reliability, in a workplace context, means consistently showing up to work on time, attending every scheduled day, and doing the job correctly.
Remanufactured/Rebuilt/Reconditioned PartsParts Identification and Sourcing: Remanufactured, rebuilt, and reconditioned parts are used components that have been restored to a specified condition through a formal process, offered as a distinct parts-sourcing category alongside new OEM, aftermarket, and recyclable parts.
Remove and Install (R&I)Estimating: Remove and install (R&I) is an estimating term describing the operation of removing a component as a complete assembly to gain access to a damaged area, then reinstalling and realigning the same component after the repair is made.
Remove and Replace (R&R)Estimating: The collision repair estimating operation that covers removing a damaged component from the vehicle, disposing of or returning it, and installing a new, recycled OEM, or reconditioned replacement part in its place - the published labor time includes all tasks necessary to complete both the removal and the installation of the replacement part.
RepairEstimating: The collision repair operation in which damage to a part is corrected by straightening, welding, filling, painting, or any combination of these techniques to restore the part's original appearance and function - as distinguished from replacement, where the damaged part is discarded and a new or serviceable equivalent is installed.
Repair OrderEstimating: A repair order (RO) is the official written document that summarizes all approved repair instructions, parts, and labor operations that the shop must perform on a collision-damaged vehicle.
Restraint SystemVehicle Systems Knowledge: A restraint system is designed to help hold people in their seats and prevent them from being injured during a collision.
Retained AusteniteVehicle Construction: Retained austenite is a metastable iron phase, rich in silicon and carbon, present in TRIP steel, that transforms into harder martensite when the steel is stretched or formed.
Right-to-Know LawsLegal and Environmental Practices: Right-to-Know Laws are federal and state regulations (rooted in OSHA's Hazard Communication Standard) that guarantee workers the legal right to obtain information about hazardous chemicals they work with - including chemical identity, health hazards, exposure limits, and safe handling procedures through required SDS documentation and employee training.

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Sail PanelVehicle Construction: The sail panel is the upper rear section of a vehicle's body just behind the rear window, covering the C-pillar area and heavily reinforced to support the roof and protect occupants during a rollover.
SalvageParts Identification and Sourcing: Used automotive parts removed from vehicles at a salvage yard (auto recycler) and resold for reuse in collision repairs - offering genuine OEM parts at significantly lower cost than new dealer parts when the salvage part's condition, mileage, and functionality meet the like-kind-and-quality standard for the repair.
Salvage PartsParts Identification and Sourcing: Salvage parts are serviceable used components removed from collision-totaled or wrecked vehicles by salvage yards and resold as lower-cost alternatives to new OEM or aftermarket replacement parts.
Salvage Parts SoftwareParts Identification and Sourcing: Salvage parts software provides easy access to a user-customized database of recycled parts and suppliers in North America and Canada, letting technicians quickly search for quality recycled parts.
Salvage Replacement PanelsParts Identification and Sourcing: Salvage replacement panels are undamaged body panels cut from wrecked vehicles at salvage yards and used as lower-cost, OEM-corrosion-protected alternatives to new replacement panels.
Salvage YardParts Identification and Sourcing: A salvage yard is a business that resells parts from damaged cars.
Secondary DamageDamage Analysis: Damage caused not by direct contact with the impacting object but by collision force shock waves traveling through the vehicle structure or by inertia loads acting on components away from the impact zone - more prevalent in unibody vehicles than body-on-frame designs; also called indirect damage (see Direct Damage).
Self-Piercing Rivet (SPR)Vehicle Systems Knowledge: A rivet that pierces and joins metal panels without a pre-drilled hole, leaving a backside hole that must be filled with structural adhesive to prevent corrosion.
Series HybridVehicle Construction: A series hybrid is a vehicle in which only the electric motor drives the wheels for propulsion, while the internal combustion engine acts exclusively as a generator to recharge the high-voltage battery pack when its charge drops below a threshold.
Series-Parallel HybridVehicle Construction: A series-parallel hybrid (full hybrid) is a vehicle in which the internal combustion engine, electric motor, or both can independently or simultaneously provide propulsion to the drive wheels, allowing maximum efficiency across all driving conditions.
Service ManualsEstimating: Service manuals (also called shop manuals) are manufacturer-published reference books, updated annually, that list the specifications and service procedures for each make and model of vehicle.
Service ModeVehicle Systems Knowledge: Service mode is a vehicle setting that suspends certain automatic or remote-connected systems during repair, preventing unexpected activation of components while a technician is working on the vehicle.
Shop Management SoftwareEstimating: Shop management software is business software that coordinates all aspects of a collision repair facility's workflow - converting electronic estimates into repair orders and tracking the job through the shop to improve productivity, profitability, and customer service.
Side Air BagsVehicle Systems Knowledge: Side air bags may be located in the door panels, roofs, pillars, or seats to protect against impact injury.
Side-sway DamageDamage Analysis: Structural or panel damage caused by a collision impact that strikes the vehicle from the side, as opposed to a front or rear impact.
Single (One-Time) Use ComponentsDamage Analysis: Single (one-time) use components are parts designed by the manufacturer to be installed only once and replaced -- never reused -- after removal, typically because their function depends on being undisturbed.
Social SkillsCustomer Relations and Sales Skills: Social skills are the skills developed to create a harmonious working environment between coworkers.
Society Of Collision Repair Specialists (SCRS)Legal and Environmental Practices: SCRS is a collision repair industry trade association, named in the source material alongside other national organizations that serve the collision repair industry.
Solenoid (SOL)Vehicle Systems Knowledge: A solenoid is an electromagnet with a movable core, or plunger, that moves when the coil is energized -- converting electrical current into mechanical motion. On a wiring diagram it is abbreviated SOL.
Space FrameVehicle Construction: An integrated structural vehicle construction in which a rigid, multi-directional cage or tube structure forms the primary strength member of the vehicle - surrounding the occupant compartment without a separate body-on-frame arrangement - engineered to provide equal resistance to impacts from any direction.
Specialty ShopCustomer Relations and Sales Skills: A specialty shop is a repair facility that limits its services to a specific type of automotive repair or service, such as wheel alignment, glass replacement, upholstery, or paint-only refinishing, to which a collision center may refer or sublet certain operations.
SpecificationsDamage Analysis: Factory-issued measurement values and procedural requirements that technicians must reference during damage analysis and repair to confirm the vehicle is restored to its original engineered condition.
Sport Utility Vehicle (SUV)Vehicle Construction: A sport utility vehicle, abbreviated SUV, is one of the major vehicle body classifications a collision shop works on, listed alongside the passenger car, pickup truck, and van.
StructuralVehicle Construction: Any vehicle component whose primary role is contributing to the vehicle's overall strength, rigidity, and crash energy management - as distinguished from cosmetic outer body panels - including frame rails, pillars, rockers, crossmembers, and floor structures; identified by I-CAR and OEM sources and designated in estimating databases with the suffix 's' on structural operation times.
SubletEstimating: A billable line item in the collision repair estimate that covers work performed by an outside specialist rather than by the repair facility itself - the shop pays the sublet vendor for the work and bills that cost (typically plus an administrative markup) to the claim, with full responsibility for the sublet work's quality remaining with the primary shop.
Sublet OperationsEstimating: Sublet operations are repair tasks sent out to a specialized outside vendor rather than performed in-house, requiring the estimator to determine their price and source separately.
SwitchVehicle Systems Knowledge: A switch is used to turn a circuit on or off manually.
Systematic ApproachDamage Analysis: A systematic approach is organizing and using a logical sequence of steps to accomplish a task or job.

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Telematics/ConnectivityVehicle Systems Knowledge: Telematics/connectivity refers to a vehicle's wireless data and communication systems, which must be identified and placed into service mode before certain repair procedures to prevent unwanted remote activity.
Time StudiesEstimating: The empirical research methodology used by estimating database publishers (Mitchell, CCC, Audatex) to establish published labor times - conducted by timing skilled technicians performing specific repair operations under standardized conditions, including realistic setup steps like tool retrieval, vehicle positioning, and obstruction clearing, to produce times that reflect real-world shop labor requirements.
Torque PatternVehicle Systems Knowledge: A prescribed crisscross or alternating tightening sequence for multiple fasteners that ensures a part is clamped evenly and prevents warpage from uneven loading.
Torque SpecificationsVehicle Systems Knowledge: Manufacturer-specified tightening values for individual fasteners that ensure correct clamp load without over-stressing the bolt or the assembled component.
Torque-to-Yield (TTY)Vehicle Systems Knowledge: A fastener design, often called a stretch bolt, that is intentionally tightened past its elastic limit during installation and must never be reused once removed.
Torx FastenerVehicle Systems Knowledge: A Torx fastener (also called a star fastener) is a six-point fastener that grips and drives without slippage, commonly used on late-model vehicles for luggage racks, headlights, taillight assemblies, mirror mountings, door strikers, seat belts, and exterior trim.
Total LossEstimating: An insurance claim determination in which the cost to restore a collision-damaged vehicle to pre-accident condition equals or exceeds a defined threshold percentage of the vehicle's actual cash value (ACV) - at which point the insurer pays the ACV minus the salvage value rather than authorizing the repair; the vehicle may still be technically repairable but is economically unviable to repair under the insurance claim.
Transformation-Induced Plasticity (TRIP) SteelVehicle Construction: Transformation-induced plasticity (TRIP) steel is an advanced high-strength steel containing ferrite, martensite, bainite, and retained austenite, engineered to harden further as it's stretched or formed.
Transverse EngineVehicle Construction: A transverse engine is an engine mounted sideways in the vehicle so the crankshaft runs across the vehicle width (left to right), which is the standard layout for front-wheel-drive vehicles and allows the engine and transaxle to be packaged compactly in the front of the vehicle.
Trim LevelEstimating: Trim level is a vehicle's specific equipment and feature package, recorded alongside paint code, transmission, and other options during estimating to correctly identify which parts and specifications apply.
Turning Radius GaugeVehicle Systems Knowledge: A turning radius gauge is a wheel alignment tool placed under the front tire that measures the steering angle (turning radius) of each front wheel in degrees as the steering wheel is turned, used to verify correct Ackermann geometry and alignment specifications.

U

Ultra High-Strength Steel (UHSS)Vehicle Construction: The highest-strength classification of automotive steel - commercially equivalent to Martensitic steel - used in the most critical occupant protection locations where maximum strength-to-weight ratio is required; characterized by yield strength typically exceeding 800-1,000 MPa; generally cannot be heat-straightened or mechanically repaired in the field and must be sectioned or replaced per strict OEM procedures.
UndercoatingVehicle Construction: Undercoating is a thick, rubberized or tar-based sound-deadening and corrosion-protection coating applied to the vehicle's underside and wheel well areas by the factory and restored during collision repair to protect lower body panels from moisture, stone chips, and road noise.
UnibodyVehicle Construction: A vehicle construction design in which body panels, structural sections, and the floor assembly are permanently joined (welded, bonded, and/or riveted) into a single integrated load-bearing unit - eliminating the separate ladder frame of body-on-frame construction; the dominant design for modern passenger cars and crossovers because it is lighter, more space-efficient, and provides better crash energy distribution than body-on-frame.
Uniform Procedures For Collision Repair (UPCR)Damage Analysis: The Uniform Procedures for Collision Repair, or UPCR, are I-CAR's published repair procedure descriptions, available at no cost online, and are described as the most complete descriptions of the actual repair operations.
UnisideVehicle Construction: A large, multi-component welded structural assembly comprising one entire side of a unibody vehicle - typically including the A, B, and C pillars, the door openings, the rocker panel, and the quarter panel - that the OEM welds together as a unit at the factory but that is generally available as individual replacement components from both OEM and aftermarket suppliers for collision repair.
United States Customary System (USCS)Vehicle Systems Knowledge: The United States Customary System, or USCS, is the fractional measuring system in which fastener head size and wrench size are both expressed as fractions rather than as metric numbers.

V

Vehicle ChassisVehicle Construction: The vehicle chassis is the structural and mechanical foundation of the vehicle, comprising the frame (or unibody structure), engine and drivetrain, suspension system, steering system, and braking system, collectively supporting the body and providing all dynamic vehicle functions.
Vehicle Identification Number (VIN)Estimating: The vehicle identification number (VIN) is a standardized 17-character alphanumeric code assigned to each vehicle at the factory that uniquely identifies the vehicle and encodes the manufacturer, vehicle attributes, model year, plant of assembly, and sequential production number.

W

Wheel RunoutVehicle Systems Knowledge: Wheel runout is an irregularity in a wheel caused by a bent or damaged rim.
Wire Color CodingVehicle Systems Knowledge: Wire color coding allows a specific wire to be identified within a harness or a connector.
Wiring DiagramsVehicle Systems Knowledge: Wiring diagrams are drawings that show the location of electrical components and how wires are routed to electronic parts -- motors, solenoids, sensors -- fuses or circuit breakers, electronic control units, and other components.
Work OrderEstimating: The shop's internal authorization document - generated from the approved damage report - that directs each technician with specific operation instructions (repair, replace, refinish) and authorized hours for every damaged component.
Work TraitsCustomer Relations and Sales Skills: Work traits are the personal and behavioral qualities - separate from technical skill - that determine whether someone is a good or bad employee, such as attitude, reliability, and cooperation.
Worker CharacteristicsCustomer Relations and Sales Skills: Worker characteristics are the non-technical personal and professional traits -- reliability, attitude, initiative, honesty, and quality consciousness -- that determine whether a collision repair technician or estimator succeeds or fails in the workplace, independent of technical skill level.
WreckerDamage Analysis: A specialized tow truck equipped with hydraulic lifting arms, winches, or a flatbed deck used to remove a collision-damaged vehicle that cannot be driven safely from an accident scene.

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Every term here has a longer explanation inside the simulator

A

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C

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Glossaries for the other ASE tests

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