BMW Electrical Sensors, Switches, & Relays for BMW E46 M3 S54 (1999-2005)

Clear BMW chassis

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:

Alternator - 120amp

10X Entries Into Our F80 M3 Sweepstakes

T#:25042542

Part#: 12317831436

Ships on Sep 29, 2026

Sale - Save 20% $ 222.99

This product was last offered at the strikethrough price on
05-03-2026

$ 178.39 USD

Add to Wish List

Qty

Sale - Save 20%

$ 222.99

This product was last offered at the strikethrough price on
05-03-2026

$ 178.39 USD

Add to Wish List

Crankshaft Sensor O-Ring (18 X 1.2 Mm)

T#:13233505

Part#: 12141402705

Ships in 2 Business Days

$ 1.49

This product was last offered at the strikethrough price on
08-26-2026

$ 1.28 USD

Add to Wish List

Qty

$ 1.28 USD

Add to Wish List

This O-Ring can sometimes leak at the bottom of your engine and need to be replaced. Fits around the head of the lower crankshaft sensor and provides a connection point.