Parts Selection, Sourcing, and Alternative Parts Considerations
What this domain tests
Parts selection is a decision with safety, legal and customer-service consequences. The exam tests the parts hierarchy, sourcing, certification marks, disclosure obligations and the categories where alternatives are unacceptable.
Core rules
- Hierarchy by usual preference: OEM new, OEM remanufactured or OEM recycled, aftermarket new (look for CAPA or NSF certification), reconditioned. Cheap is not a category; fitness for purpose is.
- Non-negotiable OEM or OEM-equivalent: structural members, airbag and restraint components, ADAS sensor brackets and mounts, and anything an OEM position statement restricts.
- Certified aftermarket parts have documented fit and material testing; uncertified parts are an unknown. Certification is not a warranty of appearance on a several-year-old vehicle.
- Disclosure: many jurisdictions require written customer consent for alternative parts, and the estimate must show part type and source.
- Betterment: a used or salvage part of lesser condition, or a new part replacing a worn one, may require a customer contribution.
Worked example
A 2019 SUV needs a hood, a front bumper cover and a radar bracket. The bracket must be OEM because sensor geometry and aim depend on it. The hood may be CAPA-certified aftermarket with disclosure and a price adjustment shown on the estimate. The cover may be a grade-A OEM recycled unit if the parking-sensor holes and tow-hook cutout match the VIN build. Reasoning: classify by function - safety-critical first, cosmetic second - then document each choice.
Traps
Putting aftermarket or salvage parts on a structural or ADAS-critical application; failing to change the part type field when sourcing changes; omitting disclosure; forgetting pre-fit or modification labor that aftermarket parts often need; and missing betterment on tires, batteries or a part that arrives in lesser condition than the original.