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3 Series Parts

Thermostat

BMW Part Number:17 21 7 638 681
17217638681short number 7638681
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One email the moment one is listed — nothing else.

Genuine BMW Part

Photos coming soon — see the BMW diagram below

Thermostat – BMW diagram16 View BMW DiagramSee this part on the official exploded view

Genuine BMW part 17 21 7 638 681: Thermostat. The number stamped on the part is 17217638681; BMW's catalog files it under the short number 7638681. You will find it on our Cooling System shelf, under Oil cooler. It supersedes the older number 7599546, so a part carrying that number is the same part. BMW has since replaced it with 7638678.

BMW's catalog records no E36 or E46 it is fitted to; it belongs to other BMW models.

BMW draws it on 8 diagrams, among them Heat exch./transmission oil cooler line (17_0483) and Heat exch./transmission oil cooler line (17_0493). It weighs about 140 g (0.3 lb).

We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.

Details

BMW Part Number17 21 7 638 681
Also written as172176386817638681
QualityGenuine BMW · OEM

No fitment data available for this part.

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.