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Alternator

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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Large HD Polyurethane Alternator Bushings - Set of 4
Turner Motorsport - Corporate Logo
T#:359471
Part#: TMS3458KT
Ships by Dec 15, 2021
Sale - Save 30% $29.95
$20.97
Free Shipping on orders $49 and up
Sale - Save 30% $29.95
$20.97
Free Shipping on orders $49 and up

Trouble trying to get your alternator tensioned or aligned properly? This is a common issue due to the rubber bushings wearing with age or degrading from exposure to the elements, oil, or other contaminants.

Restore proper alignment and tensioning function to your alternator with these Heavy Duty Alternator Polyurethane Bushings.

These will resist pressure and any possible contaminants for much longer than stock rubber bushings, making these a likely one time solution to your alternator issues!

Replaces BMW part # 12311268433. Most cars require four.

This item fits the following BMWs:
1977-1983 E21 BMW 320i
1984-1988 E30 BMW 318i 325e 325es
1988-1991 E30 BMW M3
1976-1981 E12 BMW 528i 530i
1982-1988 E28 BMW 528e 533i 535i M5
1982-1989 E24 BMW 633csi 635csi M6
1981-1987 E23 BMW 733i 735i

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Genuine BMW Alternator Bushing (20 mm Length) - E10 E12 E21 E23 E24 E28 E3 E30
Genuine BMW - Corporate Logo
T#:22410
Part#: 12311268447
Ships by Dec 8, 2021
$28.31
Free Shipping on orders $49 and up


Genuine BMW Bush - 90 Shore Lang

This item fits the following BMW Chassis:
E30 M3,E30

Fits BMW Engines including:
M10,M20,M30,S14,S38

OEM Bosch Alternator - E46 M3, Z3 S54
Bosch - Corporate Logo
T#:370775
Part#: 12317831436
Ships by ETA Dec 20, 2021
$266.06
Free Shipping

A replacement Bosch alternator for the 2001-2006 M3. Bosch is an original equipment supplier to BMW, and is the finest and most recognized German brand of alternator available. The Original BMW alternator sells for over double! Buy only the best alternator for your BMW -- buy a Bosch alternator. This is an OEM replacement for BMW part # 12317831436.

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 $80.00 refundable core charge must be applied to this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge. 

This item fits the following BMWs:
2001-2006 E46 BMW M3, M3 Convertible
2001-2002 Z3 BMW M Roadster M Coupe

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Genuine BMW Alternator Air Duct - Upper - E36 325i 325is 328i 328is M3
Genuine BMW - Corporate Logo
T#:7136
Part#: 12311730635
In Stock
14% off MSRP $46.51
$39.90
Free Shipping on orders $49 and up
14% off MSRP $46.51
$39.90
Free Shipping on orders $49 and up


Genuine BMW Intake Manifold
This item fits the following BMW Chassis:
E36 M3,E36

Fits BMW Engines including:
M50,M52,S50,S52


OEM Bosch Voltage Regulator (Bosch Alternator) - 12311726022
Bosch - Corporate Logo
T#:19326
Part#: 12311726022
Direct Ship, Expected Ship Date: Dec 7, 2021
$57.49
$57.49
This is the voltage regulator found on the back of the alternator. It's a normal wear item and the contacts are the first thing to check if you believe the alternator is not charging the battery (lights flickering or dim, battery light on in the dash, the engine quits without warning, or other electrical failures). The voltage regulator manages the voltage flowing through the car, especially to and from the battery. There are two carbon contacts on the regulator that control the magnetic field when the alternator is spinning and these contacts wear over time. A new set of contacts will be about 13mm in length. Anything less than 5mm and the voltage regulator should be replaced, regardless if that is the cause of your electrical problems or not. Most older mechanics will tell you to keep a spare regulator in your toolbox.

The carbon contacts can be replaced on their own but requires desoldering the old ones from the base and then soldering the new ones on. It may be easier to just replace the unit as a whole.

This is the OEM voltage regulator, made by Bosch or Hella. It's the one with the white base and fits most Bosch alternators from 1977-1995 (Valeo and other alternators look very different and have a black cover and base). This part number replaces the previous BMW part numbers - 12311271664, 12321279548, 12311722755, 12321711399 and Bosch part numbers 1197311021 and 1197311028.
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