Az495a car owner's reference: how to choose auto parts

Az495

Reference

This section explains what you see in your car's documents, in catalogs and on parts packaging. It covers three topics: vehicle identification, part numbers and model specifics.

Vehicle identification

VIN
A 17-character vehicle identification number (structure per ISO 3779); the letters I, O and Q are not used.
Frame number (chassis number)
An identifier used instead of a VIN on some cars built for the Japanese domestic market; it includes the model code and a serial number.
Market version
The region a car was built for; trim and some parts depend on it.

Part numbers

OEM part number
The part's number in the carmaker's catalog.
Cross-reference number
A number linking an OEM part to parts from other manufacturers.
Supersession
A new number the manufacturer has issued to replace an old one; old and new numbers are usually interchangeable, but this needs to be checked.
Number formats (examples)
Mitsubishi: two letters followed by digits (MR178827), plus newer formats with a letter inside the number; Toyota: two groups of five characters separated by a hyphen (12345-67890).

Model specifics

Generation
A version of a model with a substantially changed design; parts from different generations are generally not interchangeable.
Facelift
An update to a model within a generation; it can change exterior and electrical parts.
Trim level
The equipment fitted to a particular car; it affects brakes, suspension, wiring and interior finish.

Articles on these topics

Sources

  • ISO 3779 — VIN structure
  • Carmakers' catalogs

Information is current as of the preparation date. Manufacturer catalogs and part fitment change — check the official catalog or a dealer before buying.