Alternator for BMW E90 M3 S65 4.0L

Clear BMW chassis

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.

Sort By:

Alternator - 180amp

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:26438185

Part#: 12317837981

In Stock

Sale - Save 15% $ 304.99

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

$ 259.24 USD

Add to Wish List

Qty

Sale - Save 15%

$ 304.99

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

$ 259.24 USD

Add to Wish List

OEM Valeo Alternator - 180amp - E9X M3 S65

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

T#:377508

Part#: 12317837981

In Stock

$ 630.99

This product was last offered at the strikethrough price on
05-07-2026

$ 403.99 USD

Add to Wish List

Qty

$ 403.99 USD

Add to Wish List

This is a NEW alternator from the OEM manufacturer, Valeo. No core charge applies. Valeo is an OEM manufacturer for many BMW alternators - save money by buying the same alternator in a different box!

Genuine BMW Voltage Regulator - E9X M3 S65

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:39048

Part#: 12317847517

In Stock

7% off MSRP $ 218.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 203.99 USD

Add to Wish List

Qty

7% off MSRP

$ 218.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 203.99 USD

Add to Wish List

Ensures proper voltage is being sent from the alternator to the electrical system and battery.

OEM Bosch Remanufactured Alternator - AL9454X - BMW E9X M3 S65 ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:639734

Part#: 12317837981BKT

In Stock at Vendor

$ 526.99

This product was last offered at the strikethrough price on
05-07-2026

$ 513.99 USD

Add to Wish List

Qty

$ 513.99 USD

Add to Wish List

*Price includes a refundable $75 Core Charge* 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. Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products. As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform! Bosch Part Numbers: AL9454X, 0986UR6290 Replaces the following BMW part numbers: 12317837981, 12317838656

Show More Show Less