01
Start with the vehicle identification number
Record the VIN from the vehicle or its documents and check it for transcription errors. Use NHTSA’s VIN decoder for basic vehicle information. Its coverage focuses on U.S.-market vehicles from model year 1981 onward; older vehicles and other markets may need manufacturer records.
Keep missing or conflicting information open for review. A decoded vehicle record does not establish the part number for every component.
02
Use a parts catalog for the identified vehicle
Search the manufacturer’s parts catalog or ask the supplying dealer to check the VIN. Locate the required assembly and installation position. Retain the selected part number, catalog date and any application notes.
Year, make and model alone may leave several candidates. Ask which engine, transmission, build period, market or equipment conditions distinguish the proposed parts.
03
Compare the proposed part with the reference
Photograph the removed part, its label, connectors, mounting points and included accessories. Ask the technical owner to resolve differences against the catalog record and the intended application.
For an aftermarket alternative, request the supplier’s application evidence and specifications. An OEM cross-reference is useful purchasing information; approve the proposed alternative against the actual project requirements.
04
Example: two similar replacement assemblies
Illustrative example: a catalog search leaves two visually similar assemblies with different connector arrangements. Record both candidates and ask the dealer or technical owner which applies to the vehicle. Hold the purchase until that difference is resolved.
Carry the approved number and connector reference into the supplier request, sample label and warehouse SKU mapping. Keep the rejected candidate in the decision record to prevent accidental substitution.
05
Prepare a China sourcing and U.S. inventory brief
For a VIN EXPRESS sourcing project, provide the approved part reference, vehicle application, sample or drawing, expected quantity and unresolved questions. Agree who confirms fitment before supplier selection or development proceeds.
The agreed scope can connect China procurement and manufacturing with U.S. warehousing, fulfillment and returns. Receiving and RFID identify physical stock; engineering and fitment decisions remain with the designated technical approver.
VIN EXPRESS / Decision checklist
VIN parts lookup checklist
- Check the vehicle identifier and record missing information.
- Retain the catalog source, selected number and application notes.
- Resolve build-period, equipment and installation-position differences.
- Photograph the old part, connections and mounting points.
- Approve the technical reference before purchasing or developing a sample.
- Map the approved revision to the supplier reference and warehouse SKU.