Alternator for BMW E46 M3 S54 (1999-2005)

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The alternator keeps the battery in a constant state of charge anytime the engine is running. If your lights are dimming or you hear excessive bearing noise around the alternator, chances are that it's time for a replacement.
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Bavarian Autosport - Corporate Logo
T#:25042542
Part#: 12317831436
Ships on Sep 22, 2026
Sale - Save 20% $ 222.99

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

$ 178.39 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 222.99

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

$ 178.39 USD
Free Shipping on orders $49 and up
Genuine BMW - Corporate Logo
T#:373349
Part#: 12317831436KT
Ships in 3 Business Days
$ 1,503.99 USD
Free Shipping
$ 1,503.99 USD
Free Shipping

The alternator in your vehicle keeps the battery at full charge when your engine is running. Because all of your electronic systems run off of this small piece, it's important that it is operational. If your lights are dim while driving or your battery dies within minutes of starting your car, it's time for a new alternator.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This is a remanufactured alternator that includes a $50.00 refundable core charge.

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