Preheating control unit
12 21 7 786 82112217786821·short number 7786821Genuine BMW Part
Photos coming soon — see the BMW diagram below
02 View BMW DiagramSee this part on the official exploded view→Genuine BMW part 12 21 7 786 821: Preheating control unit. The number stamped on the part is 12217786821; BMW's catalog files it under the short number 7786821. You will find it on our Electrical shelf, under ALTERNATORMOUNTING PARTS. BMW has since replaced it with 7801200.
It fits every E46 body style (318d, 318td, 320d and 320td, 2001–2004), with the M47N engine.
BMW draws it on the Glow Plug Unit (12_1166) diagram. It weighs about 200 g (0.4 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.
Details
12 21 7 786 821122177868217786821Supersession
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- 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.