Is the OE number the same as an aftermarket part number?

No. The OE number is issued by the vehicle maker; aftermarket brands use their own numbers that cross-reference back to it. Always begin with the OE number and map equivalents from there.

Can I find a part number from the VIN?

Yes, a VIN lookup in the manufacturer electronic parts catalog identifies the exact original part number for that vehicle, including engine and trim-specific differences.

What information should I send a factory to confirm fitment?

Send the OE number, the VIN or Make/Model/Year/engine/trim, key dimensions and a clear photo of the old part. With those, a factory can confirm fitment before production.

How to Find the Correct OE Part Number for Your Car in 5 Reliable Steps