Alternator for BMW Z Series E85/6 (2003-2008)

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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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Rein Alternator Mounting Screw Set
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Rein - Corporate Logo
T#:14795
Part#: 12310392568
In Stock
$ 36.65

This product was last offered at the strikethrough price on
02-06-2026

$ 20.99 USD
Free Shipping on orders $49 and up
$ 20.99 USD
Free Shipping on orders $49 and up


BMW Set Of Alu. Screws Generator -
This item fits the following BMW Chassis:
E70 X5,E82,E83 X3,E85,E86,E89 Z4,E90,E92,E93,F10,F25 X3

Fits BMW Engines including:
N51,N52,N52N

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Alternator - 150 Amp - Valeo
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Valeo - Corporate Logo
T#:579634
Part#: 439590
In Stock
$ 620.35

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

$ 518.99 USD
Limited Qty Sale
Free Shipping
$ 620.35

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

$ 518.99 USD
Limited Qty Sale
Free Shipping
Valeo Brand New Alternator - E89 Z4 M Coupe/Roadster
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Valeo - Corporate Logo
T#:379218
Part#: 12317837691KT
Ships in 5 Business Days
$ 378.99 USD
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$ 378.99 USD
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This is a brand new Valeo alternator. BMW Alternators are built especially for extremes of heat, cold and high demand. Your BMW deserves nothing less than the best, which is why an OEM Valeo alternator is the best option. BMW alternators are built to last using the highest quality materials and the most technologically advanced processes. All alternator parts are 100% factory tested to assure that they meet or exceed original equipment specifications. And every alternator is fully load tested to guarantee compliance with BMW's strict performance specifications. 

No core charge!

Fits the following BMW Chassis:

E89 BMW Z4 M Coupe, M Roadster

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OEM Bosch Remanufactured Alternator - 120amp -- E46, Z4
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Bosch - Corporate Logo
T#:373254
Part#: 12317519620KT
In Stock
$ 380.99

This product was last offered at the strikethrough price on
05-06-2026

$ 335.00 USD
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$ 335.00 USD
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Please check the part number on the alternator to ensure that you are ordering the correct part - This alternator has an oval connector on the back! If your car has died on the side of the road from a dead battery and you notice flickering or low powered head lights, it's likely your alternator failing. To be sure you are getting a high quality part with a long life-span, choose this OEM Bosch Alternator. This is an OEM replacement for BMW part # 12317519620 & 12317519618. 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! A refundable $91.00 core charge must be applied to this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge.
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Genuine BMW Voltage Regulator - E85 E86 2.5i 3.0i, E60 525i 530i M54 ...
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Genuine BMW - Corporate Logo
T#:367803
Part#: 12317515319
Ships in 5 Business Days
8% off MSRP $ 238.99

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

$ 218.99 USD
Free Shipping
8% off MSRP
$ 238.99

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

$ 218.99 USD
Free Shipping
This regulator ensures the proper voltage is being sent to the alternator. Check the connection on the rear of the alternator before purchasing to make sure you are receiving the correct regulator.
Genuine BMW Remanufactured Alternator - E89 Z4 M Coupe/Roadster ...
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Genuine BMW - Corporate Logo
T#:372415
Part#: 12317837691KT
Ships in 1 day
$ 1,058.99 USD
Free Shipping
$ 1,058.99 USD
Free Shipping

This is a Genuine BMW remanufactured alternator. BMW Alternators are built especially for extremes of heat, cold and high demand. Your BMW deserves nothing less than the best, which is why an Original Equipment Alternator is the best option. BMW alternators are built to last using the highest quality materials and the most technologically advanced processes. All alternator parts are 100% factory tested prior to and during remanufacturing to assure that they meet or exceed original equipment specifications. And every alternator is fully load tested to guarantee compliance with BMW's strict performance specifications. 

A $50 core charge is included in the price. Upon receipt of your rebuildable alternator core, you will be refunded the core charge.  

Fits the following BMW Chassis:
E89 BMW 
Z4 M Coupe, M Roadster

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Genuine BMW Voltage Regulator - Bosch Style
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:38985
Part#: 12317540657
Ships in 3 Business Days
9% 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.

$ 198.99 USD
Free Shipping
9% 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.

$ 198.99 USD
Free Shipping


Genuine BMW Voltage Regulator - Bosch
This item fits the following BMW Chassis:
E82,E85,E86,E90,E92

Fits BMW Engines including:
N51,N52

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