Alternator
12 31 1 721 92112311721921·short number 1721921Genuine BMW Part
Photos coming soon — see the BMW diagram below
-- View BMW DiagramSee this part on the official exploded view→Genuine BMW part 12 31 1 721 921: Alternator. The number stamped on the part is 12311721921; BMW's catalog files it under the short number 1721921. You will find it on our Electrical shelf, under Alternator with motor and mounting. It supersedes the older number 1721692, so a part carrying that number is the same part. BMW has since replaced it with 1727576.
It fits the E36 sedan and coupe (318i, 1992–1999), with the M40 or M42 engines — and the European-market versions.
BMW draws it on 6 diagrams, among them Alternator Parts 90a (12_0433) and Alternator Parts 90a (12_0485). BMW lists the quantity used as “as required”. It weighs about 6.2 kg (14 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.
Details
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Every used part is inspected and graded before listing. Condition grades:
- Good — minimal wear, fully functional.
- Fair — normal wear, fully functional.
- Acceptable — visible wear, still functional.
Returns: 30 days if a part arrives damaged or isn't what the listing described. Full policy.
Shipping: Ships within the US. Orders ship within 1–2 business days; small parcels ship free on orders of $75.00 or more. Oversize items ship at a flat $49.99 each — free shipping does not cover them.