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BMW Electrical Sensors, Switches, & Relays

Electrical gremlins can be very frustrating. Luckily your BMW's electrical system is better than most, even if it's 25 years old. Here you will find electrical relays, sensors, switches, and modules for the engine, camshaft, and crankshaft. Our parts are OEM, Genuine BMW, or approved aftermarket brands that we have an excellent track record with. There is no middle ground with electrical parts - it either works perfectly or not. And there's nothing more frustrating than a new part that fails right out of the box. So it's important to choose quality replacement parts over a cheap but faulty piece.

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Bosch - Corporate Logo
T#:373255
Part#: 12417578684KT
Ships in 5 Business Days
$ 307.99

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

$ 300.99 USD
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$ 300.99 USD
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Includes a $71.50 core charge to be refunded after we receive your refundable core If your car won't turn over, there is a good chance your starter is shot. Bosch's OEM starter is a high-quality replacement that will give you peace of mind thanks to its long life-span. 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!
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Genuine BMW - Corporate Logo
T#:154930
Part#: 65759244134
Ships in 5 Business Days
3% off MSRP $ 295.99

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

$ 287.99 USD
Free Shipping
3% off MSRP
$ 295.99

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

$ 287.99 USD
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Genuine BMW Ultra Sonic-Module
This item fits the following BMW Chassis:
E82 1M Coupe,E82,E90,E92

Genuine BMW - Corporate Logo
T#:139328
Part#: 61129206219
Ships in 5 Business Days
2% off MSRP $ 722.99

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

$ 708.99 USD
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2% off MSRP
$ 722.99

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

$ 708.99 USD
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Genuine BMW Rep. Wiring Harness, Front Sector, Right -
This item fits the following BMW Chassis:
E90,E92,E93


Genuine BMW - Corporate Logo
T#:139331
Part#: 61129206222
Ships in 5 Business Days
2% off MSRP $ 584.99

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

$ 573.99 USD
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2% off MSRP
$ 584.99

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

$ 573.99 USD
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Swap out your defective wiring harness to restore your vehicle's original factory functions. Genuine BMW Rep. Wiring Harness, Front Sector, Left - This item fits the following BMW Chassis: E90,E92,E93
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Genuine BMW - Corporate Logo
T#:40038
Part#: 12517831760
Ships in 1 day
3% off MSRP $ 506.99

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

$ 493.99 USD
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3% off MSRP
$ 506.99

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

$ 493.99 USD
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Genuine BMW WIRING HARNESS, ENGINE TRANS
Fits BMW Engines including:
S54

Genuine BMW - Corporate Logo
T#:38088
Part#: 12121311710
Ships in 5 Business Days
6% off MSRP $ 233.99

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

$ 219.99 USD
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6% off MSRP
$ 233.99

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

$ 219.99 USD
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Genuine BMW Pulse Generator
This item fits the following BMW Chassis:
E34 M5,E34

Fits BMW Engines including:
S38


Genuine BMW - Corporate Logo
T#:24361
Part#: 61318360853
Ships in 5 Business Days
3% off MSRP $ 115.99

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

$ 112.99 USD
Free Shipping
3% off MSRP
$ 115.99

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

$ 112.99 USD
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Genuine BMW Stop Light Switch -
This item fits the following BMW Chassis:
E39

Genuine BMW - Corporate Logo
T#:138695
Part#: 61127842478
Ships in 5 Business Days
5% off MSRP $ 235.99

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

$ 224.99 USD
Free Shipping
5% off MSRP
$ 235.99

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

$ 224.99 USD
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Genuine BMW Wiring Harness, Transmission, Dkg -
This item fits the following BMW Chassis:
E90,E92,E93


Genuine BMW - Corporate Logo
T#:367803
Part#: 12317515319
Ships in 5 Business Days
6% 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.

$ 224.99 USD
Free Shipping
6% 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.

$ 224.99 USD
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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 - Corporate Logo
T#:154792
Part#: 65718380054
Special Order: No Guaranteed ETA
2% off MSRP $ 219.99

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

$ 214.99 USD
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2% off MSRP
$ 219.99

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

$ 214.99 USD
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Genuine BMW INTERFACE, CRUISE CONTROL
Genuine BMW - Corporate Logo
T#:13092
Part#: 12511439991
Ships in 5 Business Days
3% off MSRP $ 765.99

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

$ 745.99 USD
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3% off MSRP
$ 765.99

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

$ 745.99 USD
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Genuine BMW Engine Wiring Harness, Engine Module -
This item fits the following BMW Chassis:
E46

Fits BMW Engines including:
M52

Genuine BMW - Corporate Logo
T#:39821
Part#: 12517523229
Ships in 5 Business Days
3% off MSRP $ 477.99

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

$ 464.99 USD
Free Shipping
3% off MSRP
$ 477.99

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

$ 464.99 USD
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Genuine BMW Wiring Harness, Engine Trans. Module -
This item fits the following BMW Chassis:
E46

Fits BMW Engines including:
M54



Genuine BMW - Corporate Logo
T#:191645
Part#: 61359327136
Ships in 5 Business Days
5% off MSRP $ 385.99

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

$ 364.99 USD
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5% off MSRP
$ 385.99

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

$ 364.99 USD
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Genuine BMW Body Domain Controller Bdc
Genuine BMW - Corporate Logo
T#:21713
Part#: 12318510092
Ships in 5 Business Days
6% off MSRP $ 236.99

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

$ 222.99 USD
Free Shipping
6% off MSRP
$ 236.99

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

$ 222.99 USD
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Replace your faulty voltage regulator with this Genuine BMW part. The voltage regulator is mounted in the back of alternator on M5 and M6 models with the S85 V10 engine.

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:
2006-2011 E90 BMW 335d - Sedan
2006-2010 E60 BMW M5
2006-2010 E63 BMW M6
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Genuine BMW - Corporate Logo
T#:138691
Part#: 61127839068
Ships in 5 Business Days
5% off MSRP $ 235.99

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

$ 224.99 USD
Free Shipping
5% off MSRP
$ 235.99

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

$ 224.99 USD
Free Shipping


Genuine BMW Wiring Harness, Transmission -
This item fits the following BMW Chassis:
E90,E92,E93


Bosch - Corporate Logo
T#:373451
Part#: 12417835735KTBOS
Ships in 6 Business Days
$ 366.99 USD
Free Shipping
$ 366.99 USD
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This starter offers reliable performance at a fraction of the cost of a new unit, providing peace of mind and ensuring your BMW starts smoothly every time. This remanufactured starter from Bosch will allow your car to start like it is new. Includes $70 core charge. 
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Genuine BMW - Corporate Logo
T#:39686
Part#: 12511732156
Ships in 5 Business Days
3% off MSRP $ 267.99

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

$ 258.99 USD
Free Shipping
3% off MSRP
$ 267.99

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

$ 258.99 USD
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This is the lower engine wiring harness which connects to the secondary alternator. If you are experiencing rough running conditions, failure to start, failure of the charging system or any other erratic electrical system behavior, it may be time to replace your engine wiring harnesses. Genuine BMW WIRING-ADDITIONAL ALTERNATOR Fits BMW Engines including: M70
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Bosch - Corporate Logo
T#:384253
Part#: 12317551256KT
Ships on Oct 23, 2026
$ 661.99

This product was last offered at the strikethrough price on
09-09-2026

$ 629.99 USD
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$ 629.99 USD
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This is a OEM Bosch remanufactured 180 amp 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 Bosch 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 $84 core charge is included in the price. Upon receipt of your rebuildable alternator core, you will be refunded the core charge.  

This item fits the following BMWs:  
E60 BMW 528i/xi
E82/88 BMW 128i
E9X BMW 328i/xi
E70 BMW X5 N52 3.0L (without Adaptive Drive and Four-Zone Climate Control)
E83 BMW X3 N52 3.0L
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OEM Valeo New Alternator - 230amp
We Price Match - Give Us A Call or Chat!
Valeo - Corporate Logo
T#:383432
Part#: 12317603782
Ships on Oct 22, 2026
$ 730.99 USD
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$ 730.99 USD
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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!

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Valeo New Alternator - 230 Amp - E71, F01, F02
We Price Match - Give Us A Call or Chat!
Valeo - Corporate Logo
T#:579635
Part#: 439640
Ships on Oct 22, 2026
$ 590.99 USD
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$ 590.99 USD
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New Replacement Alternator From Valeo - 12317603781

Bosch - Corporate Logo
T#:2024
Part#: SR0446X
Ships on Oct 23, 2026
$ 477.99

This product was last offered at the strikethrough price on
08-13-2026

$ 458.99 USD
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$ 458.99 USD
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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.

This genuine Bosch Starter motor fits the following BMWs:
1992-1994 E32 7 Series 740i, 740il
1993-1995 E34 5 Series 530i, 530i wagon, 540i
1995-2001 E38 7 Series 740i, 740il
1997-2003 E39 5 Series 540i M5
2000-2003 E53 X5 X5 4.4i X5 4.6is - M62 engine
2000-2003 Z8 Z8

 

Includes $100.00 core charge to be refunded on return of your rebuildable core.

 

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Bosch - Corporate Logo
T#:186965
Part#: AL0743X
Ships on Oct 23, 2026
$ 350.99

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

$ 316.27 USD
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$ 316.27 USD
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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 $35.00 core charge to be refunded on return of your rebuildable core.
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Bosch - Corporate Logo
T#:1981
Part#: AL0734X
Ships on Oct 23, 2026
$ 1,167.99

This product was last offered at the strikethrough price on
04-10-2026

$ 804.99 USD
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$ 804.99 USD
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Replacement 150 amp water cooled Bosch alternator for 1999-2001 E38 740i & 740iL, 1999-2003 E39 540i, and 2000-2003 X5 V8 (4.4 and 4.6 liter). 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. Replaces part number 12317508054

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:
1999-2001 E38 7 Series 740i & 740iL
1999-2003 E39 5 Series 540i sedan & 540i touring wagon
2000-2003 X5 SAV with V8 engine - X5 4.4 & X5 4.6is

Includes $100.00 core charge to be refunded on return of your rebuildable core.

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Bosch - Corporate Logo
T#:359520
Part#: AL0738XKITKT
Ships on Oct 23, 2026
$ 307.00 USD
Free Shipping
$ 307.00 USD
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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 # 12311432980 and 12317501690.

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 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:
1997-2000 E39 5 Series 528i
2000 E46 3 Series 323i 323ci 328i 328ci
1997-2000 Z3 Roadster Z3 2.3 Z3 2.8

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Bosch - Corporate Logo
T#:338004
Part#: 12411712937
Ships on Oct 23, 2026
Starting at $ 284.00 USD
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Starting at $ 284.00 USD
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E36/E46/M50/M52/M54 STARTER - THIS ONE IS THE "LATER" STYLE THAT DOES NOT REQUIRE NUTS. A refundable core charge will be added to your sale, refunded to you when we get your old starter back. Replaces Bosch part number SR0445X.

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.​

This item fits the following BMWs:
1990-1991 E30 BMW 318i 318is 318ic
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 530i
2004-2005 E83 BMW X3 2.5i X3 3.0i
1996-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
1998-2000 Z3 BMW M Roadster M Coupe
2003-2005 E85 BMW Z4 2.5i Z4 3.0i
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Bosch - Corporate Logo
T#:639680
Part#: 12317836592KT1KT
Back Ordered
$ 409.99 USD
Free Shipping
$ 409.99 USD
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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 # 12317836592. 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 $75.00 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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Bosch - Corporate Logo
T#:639721
Part#: 12417798035KT1
Ships on Oct 23, 2026
$ 403.99

This product was last offered at the strikethrough price on
05-08-2026

$ 369.99 USD
Free Shipping
$ 369.99 USD
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This remanufactured starter from Bosch will allow your car to start like it is new. Includes $75 core charge.

Genuine BMW - Corporate Logo
T#:39279
Part#: 12421439334
Ships in 5 Business Days
3% off MSRP $ 97.99

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

$ 94.99 USD
Free Shipping
3% off MSRP
$ 97.99

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

$ 94.99 USD
Free Shipping


Genuine BMW Cable Alternator-Starter -
This item fits the following BMW Chassis:
E39

Fits BMW Engines including:
M54


Genuine BMW - Corporate Logo
T#:13098
Part#: 12517831649
Special Order: No Guaranteed ETA
3% off MSRP $ 608.99

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

$ 592.99 USD
Free Shipping
3% off MSRP
$ 608.99

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

$ 592.99 USD
Free Shipping
Genuine BMW wiring harness for engine transmission module.
Genuine BMW - Corporate Logo
T#:14807
Part#: 12311735708
Special Order: No Guaranteed ETA
4% off MSRP $ 76.99

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

$ 73.99 USD
Free Shipping
4% off MSRP
$ 76.99

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

$ 73.99 USD
Free Shipping


Genuine BMW Intake Manifold -
This item fits the following BMW Chassis:
E34

Fits BMW Engines including:
M50


Hella - Corporate Logo
T#:2084
Part#: 13627839138
Special Order: No Guaranteed ETA
$ 99.99 USD
Free Shipping
$ 99.99 USD
Free Shipping
This crank shaft position sensor provides the ECU with the engine speed signal. OEM Hella sensors are a perfect replacement for faulty position sensors causing poor engine operation. It is mounted in the bell housing at about the 7 o'clock postion of the transmission on most cars. This sensor fits BMW E90 E92 E93 M3, E39 540i M5, E60 M5, E63 M6, E38 740i 740il 750il 1997-2001, E31 840ci 850ci, E52 Z8.
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Hella - Corporate Logo
T#:553500
Part#: 12141726065
Special Order: No Guaranteed ETA
$ 95.99 USD
Free Shipping
$ 95.99 USD
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The crankshaft sensor in your BMW does many important things. It relays to the engine computer the speed of the crank which is important for spark and fuel control. If your BMW cranks but won't start, there is a strong chance this sensor is your problem.
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Dahler Tuning - Corporate Logo
T#:13727071
Part#: DAHELECS-ATTC
Special Order: No Guaranteed ETA
$ 425.00 USD
Free Shipping
$ 425.00 USD
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This anti-theft throttle controller from Dahler lets you custom-tune your throttle's responsiveness and the security of your vehicle. With 5 preset modes from valet mode to track mode, there are no limits to what you can do. The anti-theft feature completely disables the throttle when activated, so when if in an unfortunate theft situation, even with the car started and in gear, there is no way your car can move, saving your vehicle from falling into someone else's less-than-legal possession. COMFORT MODE (blue) Unfamiliar terrain and too much traffic? This mode lets you take it easy. Your gas pedal reacts less sensitively – especially when starting off. Your stress level will thank you. ECO MODE (green) $5.00 a gallon? There are a few tricks you can use to save fuel and money when driving. This driving program supports you in reducing the average fuel consumption of your BMW if certain rules of economical driving are observed. SPORT MODE (red) This driving program gives your vehicle a much sportier character. Your BMW reacts with a significantly better response and a straighter acceleration. The response time of the engine is significantly improved. TRACK MODE (purple) If you are not yet satisfied with the sports program and you like to push yourself to the limit, then give it a try. For those who go on tracks or run cars with 85 Ethanol this mode might be the right choice.
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Crankshaft Position Sensor - E30 325e 325i 325is E34 525i
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:338003
Part#: 12141720852
Back Ordered
Starting at $ 108.99 USD
Free Shipping
Starting at $ 108.99 USD
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This crank shaft position sensor (CPS) provides the engine computer with engine speed data via the harmonic balancer. It mounts off the engine block and reads the front crank pulley to tell the engine what position the engine internals are in. This sensor is crucial for starting the car as the ECU will not allow the engine to start without this signal. It fits all M20 engines in the E30 and E34. A lot of times the sensor is covered in oil, broken from a spinning belt, or the clearance to the pulley is not correct (should be .040"). Interchangeable with #12141720856.

Brand Options:
Original BMW - more expensive but higher quality and more consistent reliability. The sensor itself has a metal housing that is more durable and will not be affected by heat as much.
Aftermarket/Overseas manufacturer - cheaper than OE BMW but less quality and potentially less consistent. Plastic housing is more susceptible to damage from heat.

This item fits the following BMWs:
1987-1991 E30 BMW 325e 325es 325i 325is 325ix 325ic
1989-1990 E34 BMW 525i
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Bosch - Corporate Logo
T#:596770
Part#: 13537787167
Special Order: No Guaranteed ETA
$ 319.99 USD
Free Shipping
$ 319.99 USD
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Located on the end of the high-pressure fuel rail/accumulator. Bosch part number: 0281002497
Genuine BMW - Corporate Logo
T#:139105
Part#: 61129130313
Back Ordered
3% off MSRP $ 315.99

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

$ 305.99 USD
Free Shipping
3% off MSRP
$ 315.99

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

$ 305.99 USD
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Genuine BMW Battery Cable (Plus Pole) - Sbk
This item fits the following BMW Chassis:
E93



Denso - Corporate Logo
T#:384619
Part#: 12317616119
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$ 442.99 USD
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$ 442.99 USD
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Denso Brand 

When power starts to fade in your BMW, chances are your alternator is losing power. The warning light should illuminate, warning you of such a failure. Replace with a new unit today. Do not get stuck on the side of the road.

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Genuine BMW - Corporate Logo
T#:137932
Part#: 61122695530
Back Ordered
3% off MSRP $ 309.99

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

$ 301.99 USD
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3% off MSRP
$ 309.99

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

$ 301.99 USD
Free Shipping


Genuine BMW Battery Cable (Plus Pole) - Sbk
This item fits the following BMW Chassis:
E46 M3,E46

Bosch - Corporate Logo
T#:639677
Part#: 12317591530BKT
Back Ordered
$ 660.99

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

$ 480.60 USD
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$ 480.60 USD
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*Price includes a refundable $100 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!
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Valeo - Corporate Logo
T#:371896
Part#: 12317501599
Ships on Oct 22, 2026
$ 323.99 USD
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$ 323.99 USD
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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!

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Bosch - Corporate Logo
T#:38940
Part#: 12311747920
Back Ordered
$ 217.00

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

$ 210.99 USD
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$ 210.99 USD
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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.

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.

This is the OEM Bosch voltage regulator and will only fit Bosch alternators.
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OEM Valeo Alternator - E60 E63 E65 550i 650i 750i
We Price Match - Give Us A Call or Chat!
Valeo - Corporate Logo
T#:379446
Part#: 12317542935KT
Ships in 5 Business Days
$ 444.99 USD
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$ 444.99 USD
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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!

For vehicles with production date from 03/2005.

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Continental Knock Sensor - E36, E39
We Price Match - Give Us A Call or Chat!
Continental - Corporate Logo
T#:581320
Part#: S103541001Z
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$ 81.99 USD
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$ 81.99 USD
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also known as "Ping Sensor"
Genuine BMW - Corporate Logo
T#:138283
Part#: 61126928990
Ships in 1 day
3% off MSRP $ 374.99

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

$ 364.99 USD
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3% off MSRP
$ 374.99

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

$ 364.99 USD
Free Shipping


Genuine BMW Battery Cable (Plus Pole) - Sbk
This item fits the following BMW Chassis:
E63 M6,E63


Valeo Alternator - 180 Amp - E70
We Price Match - Give Us A Call or Chat!
Valeo - Corporate Logo
T#:377914
Part#: 12317561004
Ships in 5 Business Days
$ 482.99 USD
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$ 482.99 USD
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Brand new unit with no core charge.

Bosch - Corporate Logo
T#:179748
Part#: AL9413X
Back Ordered
$ 399.99 USD
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$ 399.99 USD
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140 amp Bosch alternator for many BMW X5 3.0i with M54 6 cylinder engine.. Bosch is an original equipment supplier to BMW, and is the finest and most recognized German alternator brand available. Buy only the best alternator for your BMW -- buy a Bosch alternator. Same as BMW part#12317530086 or 12317532627.

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 item fits the following BMWs:
2004-2006 E53 BMW X5 3.0i

Includes $90.00 core charge to be refunded on return of your rebuildable core.

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OEM Valeo Starter (New)
We Price Match - Give Us A Call or Chat!
Valeo - Corporate Logo
T#:380773
Part#: 12417835737
Back Ordered
$ 593.99 USD
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$ 593.99 USD
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A failed starter will leave even the best-maintained BMW stranded. Replace your failed starter motor with this brand new replacement from Valeo. Valeo is an OEM BMW supplier - save money and by quality parts by buying them in a different  box!                          
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Bosch - Corporate Logo
T#:1760
Part#: SR442X
Back Ordered
$ 222.99

This product was last offered at the strikethrough price on
04-15-2026

$ 169.00 USD
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$ 169.00 USD
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This genuine Bosch Starter fits the following BMWs:
1988 E28 5 Series 528e M5
1988-1989 E24 6 Series M6
1984-1987 E23 7 Series 735i

Includes $60.00 core charge to be refunded on return of your rebuildable core.

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Remanufactured Alternator - 120amp
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Bosch - Corporate Logo
T#:374262
Part#: 12311433266KT1
Ships in 1 Business Day
$ 319.99 USD
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$ 319.99 USD
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Don't let a failing alternator compromise your BMW's power grid or leave you stranded on the street or at the track. This direct fit replacement restores factory fresh electrical charging capacity, ensuring your battery stays fully topped off
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Genuine BMW - Corporate Logo
T#:139452
Part#: 61129241328
In Stock
Sale - Save 69% $ 316.99

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

$ 97.57 USD
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Sale - Save 69%
$ 316.99

This product was last offered at the strikethrough price on
05-02-2026

$ 97.57 USD
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Genuine BMW Wiring Harness, Actuator Control Module -
This item fits the following BMW Chassis:
F10,F12,F13