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BMW E34 Alternator & Alternator Parts

BMW E34 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!
You're currently viewing parts for your (E34) 5-Series 1989-1995. Reset your chassis
For accurate results, specify your model below.
OEM Bosch Voltage Regulator (Bosch Alternator) - 12311726022 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.
Part #: 12311726022
Price: $49.95 (USD) 
Quantity:   
Bosch Alternator - 140 amp - E36, E36 M3, E34 (M50), MZ3 (S52) 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.

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)
Part #: AL0739X
Price: $313.95 (USD) 
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Bosch Alternator - 80amp - E36, E36 M3, E34 (M50)

Replacement 80 amp Bosch alternator for the M50, M52, S50 and S52 engine, found in many BMW's between 1992 1999. 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. Price includes $111 core charge 

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!

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

Part #: AL0749X-COREKT
Price: $352.20 (USD) 
Quantity:   
OEM Bosch Remanufactured Alternator - 140 amp -- E32 735i/iL E34 530i 535i

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. OEM replacement from BMW part number 12311466088 and 12311735706

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 $65.00 refundable core charge is included with this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge. 

This Bosch Alternator fits the following BMWs:
1989-1993 E34 BMW 535i
1988-1992 E32 BMW 735i 735il

Part #: AL148X
Price: $262.95 (USD) 
Quantity:   
Bosch Alternator - E34 525i 1989-1990 (M20 Engine) - 140 amp A replacement 140 amp Bosch alternator for the 1989-1990 525i. 

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:
1989-1990  E34 5 Series  525i & 525i wagon
Part #: AL0154X
Price: $330.95 (USD) 
Quantity:   
Bosch Alternator - 115 Amp - E34 535i, E32 735i/IL 115 amp Bosch alternator for many BMW M30 6 cylinder engines on E34 5 series and E32 7 series. 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. 12311735704

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:
1989-1993 E34 BMW 535i
1988-1992 E32 BMW 735i 735il
Part #: AL143X
Price: $329.95 (USD) 
Quantity:   
Voltage Regulator (Bosch Alternator) - 12311747920 - E34,E36,E36 M3 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. There is a wear mark on the contacts and if the tip is within 3mm of this wear mark the 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.

This is the OEM Bosch voltage regulator and will only fit Bosch alternators.
Part #: 12311747920
Price: $115.35 (USD) 
Quantity:   
Bosch Alternator - 1993 E34 525i & 525i Touring (1993 only) 115 amp Bosch alternator for 1993 525i & 525i Touring (the E34 chassis). 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.

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:
1993-1993 E34 5 Series 525i & 525i Touring (1993 model only)

Includes $123.00 core charge to be refunded on return of your rebuildable core.

Part #: AL0741X
Price: $368.95 (USD) 
Quantity:   
Bosch Alternator - 1993-1995 V8 - E34 530i/540i & E32 740i/740il Replacement Bosch alternator for the 1993-1995 V8 engine (M60), found in the E34 530i & 540i, and E32 740i/740iL (thru 1994). 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.

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:
1994-1995 E34 5 Series V8 530i & 540i
1992-1995 E32 7 Series V8 740i & 740iL
1994-1995 E31 8 Series V8 840C/ 840i

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

Part #: AL0742X
Price: $324.95 (USD) 
Quantity:   
OEM Bosch Remanufactured Alternator - 140amp -- E36 E34

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

Part #: 12311744567
Price: $326.21 (USD) 
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Quantity:   
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