Skip to content
FREE SHIPPING on US orders over $75 (oversize excepted) • Quality used E36 & E46 parts • Every part inspected & graded
3 Series Parts

Insulating cover

BMW Part Number:12 31 1 738 358
12311738358short number 1738358
♡ Save for later
Out of Stock

One email the moment one is listed — nothing else.

Fits E36 — 320i, 323i, 323i 2.4, 323ti, 325i, 325is, 328i, M3 +1 more
Select your vehicle to check fitment

Genuine BMW Part

Photos coming soon — see the BMW diagram below

Insulating cover – BMW diagram04 View BMW DiagramSee this part on the official exploded view

Genuine BMW part 12 31 1 738 358: Insulating cover. The number stamped on the part is 12311738358; BMW's catalog files it under the short number 1738358. You will find it on our Electrical shelf, under Alternator with motor and mounting.

It fits every E36 body style (320i, 323i, 325i, 328i and M3, 1992–1999), with the M50, M52, S50 or S52 engines — and the European-market versions.

BMW draws it on 9 diagrams, among them Alternator, individual parts 80A (12_0461) and Alternator, individual parts 80A (12_0465). It weighs about 39 g (under 0.1 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 Number12 31 1 738 358
Also written as123117383581738358
QualityGenuine BMW · OEM
SedanM52AutomaticCB85

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.