How to Read Automotive OEM Part Numbers Correctly

How to Read Automotive OEM Part Numbers Correctly

This BVS guide focuses on evidence-led identification of used automotive components. The exact part number should be treated as the primary compatibility reference, with vehicle and physical checks used to support the decision.

Section 1

OEM part numbers are one of the most useful identifiers for used vehicle components. They are more precise than broad descriptions such as BMW module or VW ECU.

Section 2

Keep every prefix and suffix. A final letter can identify a revision or application, so removing it can turn a precise identifier into an unreliable search.

Section 3

A component can carry a vehicle manufacturer reference and a supplier reference such as Bosch or Delphi. Record all visible references rather than choosing one by assumption.

Section 4

Similar numbers should not be treated as interchangeable. A one-character difference can identify a different electrical or mechanical configuration.

Section 5

Combine the number with model, generation, year, engine, gearbox and equipment checks. This creates a stronger fitment decision than any single data point.

Section 6

FAQs: Should spaces matter? Record the number exactly as printed. Should the suffix be included? Yes. Is the vehicle model enough? No.

BVS internal resources

For related part-number guidance, see https://www.burtonvagspares.com/post/vw-audi-seat-skoda-part-number-guide. For rare and obsolete parts, see https://www.burtonvagspares.com/post/how-to-find-rare-obsolete-car-parts-uk.