BMW Electrical Sensors, Switches, & Relays for BMW E90 M3 S65 4.0L

Clear BMW chassis

Please ensure your correct model is selected

Electrical gremlins can be very frustrating. Luckily your BMW's electrical system is better than most, even if it's 25 years old. Here you will find electrical relays, sensors, switches, and modules for the engine, camshaft, and crankshaft. Our parts are OEM, Genuine BMW, or approved aftermarket brands that we have an excellent track record with. There is no middle ground with electrical parts - it either works perfectly or not. And there's nothing more frustrating than a new part that fails right out of the box. So it's important to choose quality replacement parts over a cheap but faulty piece.

Sub-Categories

Sort By:

Genuine BMW - Corporate Logo
T#:55281746
Part#: 125275WRKT
Ships in 6 Business Days
New Item
$ 37.40 USD
Free Shipping on orders $49 and up
This Genuine BMW wiring repair kit is the ideal solution to refresh worn-out terminal connections in your Ultimate Driving Machine.

SEG Automotive - Corporate Logo
T#:58965212
Part#: 0124.525.561
Ships on Oct 30, 2026
New Item
$ 487.99 USD
Free Shipping on orders $49 and up
SEG Automotive, the company behind Bosch's starter motor and generator business, builds this brand-new 150-amp alternator with a freewheel pulley that smooths out belt loads for a quieter, longer-lasting accessory drive.
Show More Show Less

Bosch - Corporate Logo
T#:57304037
Part#: 12417843530
Special Order: No Guaranteed ETA
New Item
$ 412.99 USD
Free Shipping on orders $49 and up
Ensure your high-performance engine cranks reliably every time with an OE-quality starter motor from Bosch.
Positive Cable Battery Connection Pole
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:57616371
Part#: 61129217031
Ships on Jan 11, 2027
New Item
$ 135.99 USD
Free Shipping on orders $49 and up