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BMW Alternator & Alternator Parts

Bosch Alternators are built especially for extremes of heat, cold and high demand. Your BMW deserves nothing less than the best, which is why BMW has used Bosch as an Original Equipment Alternator manufacturer for decades. Bosch 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 Bosch alternator is fully load tested to guarantee compliance with Bosch's strict performance specifications. Buy the best alternator for your BMW: Buy a Bosch Alternator!

OEM Bosch Alternator - E46 M3, Z3 S54
Bosch - Corporate Logo
T#:370775
Part#: 12317831436
In Stock
$279.95
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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

Bosch Alternator - 140 amp - E36, E36 M3, E34 (M50), MZ3 (S52)
Bosch - Corporate Logo
T#:338549
Part#: AL0739X
In Stock
Starting at $313.95
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Starting at $313.95
Free Shipping
Replacement 140 amp Bosch alternator for the M50, M52, S50 and S52 engine, found in many BMW's between 1992 2000. The 80 amp alternator is the standard size for most 3 series. The 140 amp is an upgrade, deliverying more power to your electrical system, ideal for cars with more electrical items (such as high powered stereo systems, convertible tops, etc). Bosch is an original equipment supplier to BMW, and is the finest and most recognized German brand of alternator available. Buy only the best alternator for your BMW -- buy a Bosch alternator.

Note: this alternator does not come with a pulley. Bosch does not supply any pulley with this during their rebuilds.
If you are replacing an existing 140a alternator, simply re-use your original pulley.
If you are replacing a Bosch alternator of a different amp, measure your existing pulley and confirm it is 55mm in diameter.
If you are replacing a Valeo brand alternator, you will need to also purchase the 55mm alternator pulley from the menu below. Your original Valeo pulley will not work on the new Bosch 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 exacting assembly process and high level of durability you can expect a long service life from all Bosch products.

A $70.00 refundable core charge must be applied to this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge.

This Bosch Alternator fits the following BMWs:
1991-1992 E34 5 Series 525i (with 24 valve M50 engine)
1992-1995 E36 3 Series 6 cylinder - 325i, 325is
1996-1998 E36 3 Series 6 cylinder - 328i, 328is, 323is
1995-1999 E36 M3 all, including M3 3.0 liter and M3 3.2 liter
1998-2000 MZ3 M Roadster (with S52 engine)
1999-2000 MZ3 M Coupe (with S52 engine)
Alternator Air Duct - E36 323i 325i 328i M3
URO - Corporate Logo
T#:2099
Part#: 12311735915
In Stock
$18.95
Free Shipping on orders $99 and up
This is the alternator air duct that goes from the inlet scoop to the alternator.. It fits BMW E36 323is 323ic 325i 325is 325ic 328i 328ic 328is M3 1992-1998.

This item fits the following BMWs:
1992-1998 E36 BMW 323is 323ic 325i 325is 325ic 328i 328ic 328is M3

Alternator Pulley - E82 E90 E92 E60
Ina - Corporate Logo
T#:19332
Part#: 12317570152
In Stock
$50.97
$36.60
Limited Qty Sale
Free Shipping on orders $99 and up
$50.97
$36.60
Limited Qty Sale
Free Shipping on orders $99 and up
This OEM alternator pulley has a ratcheting mechanism inside that can wear out, causing a rattling sound. This mechanism allows the alternator to freewheel to a degree. This is only for the Valeo brand alternator/

This item fits the following BMWs:
2008+ E82 BMW 128i with N51 engine
2006-2007 E90 BMW 325i 325xi 330i 330xi - Sedan
2006-2007 E90 BMW 328i 328xi - Sedan with N51 engine
2006-2007 E91 BMW 325xi - Wagon
2007-2007 E92 BMW 328i 328xi 328i xDrive - Coupe with N51 engine
2006-2007 E60 BMW 525i 525xi 530i 530xi

OEM Bosch Remanufactured Alternator - 120amp -- E46, Z4
Bosch - Corporate Logo
T#:373254
Part#: 12317519620KT
In Stock
$254.92
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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.

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 $70.00 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:
2001-2005 E46 BMW 325i 325ci 325xi - Only for cars with M54 engine
2001-2005 E46 BMW 330i 330ci 330xi
2003-2005 E85 BMW Z4 2.5i Z4 3.0i

Large HD Polyurethane Alternator Bushings - Set of 4
Turner Motorsport - Corporate Logo
T#:359471
Part#: TMS3458KT
In Stock
Sale - Save 15% $22.00
$18.70
Sale - Save 15% $22.00
$18.70

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


Alternator Pulley - D=55mm - E36 E46 E39 Z3
Genuine BMW - Corporate Logo
T#:7128
Part#: 12311432988
In Stock
17% off MSRP $49.62
$41.34
Free Shipping on orders $99 and up
17% off MSRP $49.62
$41.34
Free Shipping on orders $99 and up
This is the Genuine BMW alternator pulley that mounts to the front of the alternator. It is 55mm in diameter and designed for use on Bosch alternators.

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 item fits the following BMWs:
1992-1998 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2000 E46 BMW 323i 323ci 328i 328ci
1997-2000 E39 BMW 528i
1996-2000 Z3 BMW Z3 1.9 Z3 2.3 Z3 Z3 2.8
OEM Bosch Alternator Gasket -- E39 E38 E65 E66 E67 E53
Bosch - Corporate Logo
T#:361217
Part#: 12317507996
In Stock
$5.56
Free Shipping on orders $99 and up

Every time you remove your alternator, it is recommended this gasket is replaced. Bosch offers this high quality replacement to ensure a tight seal to prevent coolant from leaking. This is an OEM replacement for BMW part number 12317507996.

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!


OEM Valeo Alternator - 120amp - E39 E46 E53 Z3, M54 with Valeo Alternator
Valeo - Corporate Logo
T#:371896
Part#: 12317501599
In Stock
$284.95
$284.95

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.

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!


OEM Bosch Remanufactured 180 Amp Alternator - E82/88 E9X E60/61 N54
Bosch - Corporate Logo
T#:373812
Part#: 12317558220KT1
In Stock
$496.84
Free Shipping

Replace your dead alternator with this new unit and make sure your battery is being charged properly.

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 exacting assembly process and high level of durability you can expect a long service life from all Bosch products.

Includes a $75.00 core charge to be refunded after we receive your refundable core.

E46 M3, MZ3 S54 OEM Valeo Alternator (New)
Valeo - Corporate Logo
T#:377735
Part#: 12317831436
In Stock
$184.27
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.

This is a NEW alternator from the OEM manufacturer, Valeo. No core charge applies.

OEM Bosch Voltage Regulator - 180A - E82/88, E9X, E60/61 LCI, E70, E83, E84
Bosch - Corporate Logo
T#:558831
Part#: 12317561939
In Stock
$59.95
Free Shipping on orders $99 and up

Ensure the correct voltage is being sent to/from the alternator, keep you electrical system safe from excessive voltage peaks that could cause damage to sensitive electronics and blow out fuses. Bosch's high quality unit will give you peace of mind knowing the electrical system will be safe and the voltage will remain steady. OEM replacement for BMW part # 12317561939

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 Alternator - 90 Amp - E36 325i, 325is (1992 only)
Bosch - Corporate Logo
T#:186965
Part#: AL0743X
In Stock
Sale - Save 24% $264.95
$200.52
Free Shipping
Sale - Save 24% $264.95
$200.52
Free Shipping

90 amp Bosch alternator for 1992 BMW E36 325i with M50 engine. Bosch is an original equipment supplier to BMW, and is the finest and most recognized German brand of alternator available. Buy only the best alternator for your BMW -- buy a Bosch alternator. Can be used in place of bmw part number.

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 exacting assembly process and high level of durability you can expect a long service life from all Bosch products.

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

This Bosch Alternator fits the following BMWs:
1992 E36 BMW 325i 325is

Includes $65.00 core charge to be refunded on return of your rebuildable core.

OEM Bosch Voltage Regulator (90amp/120amp) -- E46 E39 E53 Z3
Bosch - Corporate Logo
T#:373840
Part#: 12317559183
In Stock
$33.28
Free Shipping on orders $99 and up

Ensure the correct voltage is being sent to/from the alternator, keep you electrical system safe from excessive voltage peaks that could cause damage to sensitive electronics and blow out fuses. Bosch's high quality unit will give you peace of mind knowing the electrical system will be safe and the voltage will remain steady. OEM replacement for BMW part # 12317559183 and 12317501752.

Cars that have oval or D shaped connector use BMW part # 12317515319

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!

OEM Bosch Remanufactured Alternator - 140amp -- E36 E34
Bosch - Corporate Logo
T#:371693
Part#: 12311744567
In Stock
$326.21
Free Shipping

If your headlights or interior are flickering or dimming while driving, there is a good chance your alternator is dying. This high quality Bosch replacement will have your electrical system back in top shape. OEM replacement for 12311744567 and 12311738352.

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 is applied to this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge.


OEM Valeo Alternator - 180amp
Valeo - Corporate Logo
T#:376244
Part#: 12317525376
In Stock
$389.95
$389.95

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.

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 Rubber Boot - 12311710514 - E34
Genuine BMW - Corporate Logo
T#:7129
Part#: 12311710514
In Stock
16% off MSRP $14.36
$12.09
Limited Qty Sale
Free Shipping on orders $99 and up
16% off MSRP $14.36
$12.09
Limited Qty Sale
Free Shipping on orders $99 and up


Genuine BMW Rubber Boot -
This item fits the following BMW Chassis:
E34

Fits BMW Engines including:
M20,M30,M50

OEM Valeo Alternator - 180amp
Valeo - Corporate Logo
T#:377508
Part#: 12317837981
In Stock
$265.28