BMW Electrical Sensors, Switches, & Relays for BMW 3 Series E46 (1999-2005)

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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.

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New Alternator - 120A
New Alternator - 120A
10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!
Bavarian Autosport - Corporate Logo
T#:25042543
Part#: 12317501690
In Stock
Sale - Save 20% $ 211.99

This product was last offered at the strikethrough price on
11-07-2026

$ 169.59 USD
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Sale - Save 20%
$ 211.99

This product was last offered at the strikethrough price on
11-07-2026

$ 169.59 USD
Free Shipping on orders $49 and up
Add to Wish List
Alternator - 120amp
Alternator - 120amp
10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!
Bavarian Autosport - Corporate Logo
T#:25042542
Part#: 12317831436
In Stock
Sale - Save 25% $ 222.99

This product was last offered at the strikethrough price on
11-07-2026

$ 167.24 USD
Free Shipping on orders $49 and up
Add to Wish List
Sale - Save 25%
$ 222.99

This product was last offered at the strikethrough price on
11-07-2026

$ 167.24 USD
Free Shipping on orders $49 and up
Add to Wish List
Crankshaft Sensor O-Ring (18 X 1.2 Mm)
Crankshaft Sensor O-Ring (18 X 1.2 Mm)
Victor Reinz - Corporate Logo
T#:13233505
Part#: 12141402705
Ships in 1 Business Day
$ 1.49

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

$ 1.28 USD
Free Shipping on orders $49 and up
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$ 1.28 USD
Free Shipping on orders $49 and up
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.

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