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

Adapter lead

BMW Part Number:12 51 3 454 678
12513454678short number 3454678
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One email the moment one is listed — nothing else.

Genuine BMW Part

Photos coming soon — see the BMW diagram below

Adapter lead – BMW diagram-- View BMW DiagramSee this part on the official exploded view

Adapter lead — a genuine BMW part, number 12 51 3 454 678. The number stamped on the part is 12513454678; BMW's catalog files it under the short number 3454678. You will find it on our Electrical shelf, under Engine wiring harness.

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

BMW draws it on the Wiring harness (61_2433) diagram. It weighs about 10 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 51 3 454 678
Also written as125134546783454678
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.