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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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OBDI Conversion Part - Water Temp Sensor Wiring Adaptor
10X Entries Into Our F80 M3 Sweepstakes
Turner Motorsport - Corporate Logo
T#:508
Part#: TEN9989M50
In Stock
Sale - Save 25% $ 89.99

This product was last offered at the strikethrough price on
06-13-2026

$ 67.49 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 89.99

This product was last offered at the strikethrough price on
06-13-2026

$ 67.49 USD
Free Shipping on orders $49 and up
Made in the USA The TMS Water Temp Sensor Wiring Adaptor is needed when you are upgrading to OBD-I (1992-1995 components) on a 3.2 or 2.8 liter engine. These earlier engines use two separate water temp sensors in the head, one for the ECU and one for the instrument cluster. Most of the 3.2 and some of the 2.8 liter engines do not have two holes drilled in the head for the early water temp sensors. This is due to the fact that the 3.2 and 2.8 engines used a combined water temp sensor. So we designed a easy to use plug and play wiring harness. The benefits are: No cutting and splicing, no trying to fine plugs and pins. We also suggest using TMS "3.2 in a 3.0" Coolant Hose Adapter P/N: TEN9931007 to make your life easier.
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Bosch - Corporate Logo
T#:558831
Part#: 12317561939
In Stock
$ 61.91 USD
Free Shipping on orders $49 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!

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Bosch - Corporate Logo
T#:373840
Part#: 12317559183
In Stock
$ 37.99

This product was last offered at the strikethrough price on
04-13-2026

$ 37.36 USD
Free Shipping on orders $49 and up
$ 37.36 USD
Free Shipping on orders $49 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!

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Meyle Crankshaft Position Sensor - E36, E39, E46, E53, E60, E83, Z3, ...
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We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:369703
Part#: 12141709616
In Stock
$ 46.99 USD
Free Shipping on orders $49 and up
Does not include O-ring

Febi - Corporate Logo
T#:591868
Part#: 12147539165
In Stock
$ 31.99 USD
Free Shipping on orders $49 and up
$ 31.99 USD
Free Shipping on orders $49 and up
Bosch - Corporate Logo
T#:19326
Part#: 12311726022
In Stock
$ 71.99 USD
Free Shipping on orders $49 and up
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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Bosch - Corporate Logo
T#:555413
Part#: 13621725323
In Stock
$ 34.33 USD
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Located on the intake manifold or intake box
Febi Outdoor Temperature Sensor / Probe
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Febi - Corporate Logo
T#:382731
Part#: 65816936953
Ships in 1 Business Day
$ 20.79 USD
Free Shipping on orders $49 and up
Common fix for incorrect OBC temperature readings


Bosch - Corporate Logo
T#:592045
Part#: 13627588095
In Stock
$ 28.99 USD
Free Shipping on orders $49 and up

Ensure precise timing in your BMW engine with this Camshaft Gear Sensor, also known as the "pulse generator". Designed to mount on the side of the cylinder head, this sensor accurately detects camshaft timing. When an engine fault code related to timing emerges, replacement of this sensor becomes essential for optimal engine performance.

Benefits:

  • Ensures precise timing detection
  • Vital for engine fault code related to timing
  • Mounts to the side of the cylinder head
  • Essential for BMW engine performance
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Bosch - Corporate Logo
T#:224664
Part#: AL148X
In Stock
$ 315.99 USD
Free Shipping on orders $49 and up

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 $75.00 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

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Bosch - Corporate Logo
T#:40004862
Part#: SR9521XKT
Ships in 1 Business Day
$ 465.99

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

$ 436.99 USD
Free Shipping on orders $49 and up
$ 436.99 USD
Free Shipping on orders $49 and up
The advertised price includes a refundable $60 core charge 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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Bosch - Corporate Logo
T#:13084
Part#: 12317515319
Ships in 1-2 days
$ 54.85 USD
Free Shipping on orders $49 and up
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.
Knock Sensor
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:35964551
Part#: 13627568422
Back Ordered
$ 75.99 USD
Free Shipping on orders $49 and up
This sensor detects engine knocking or pinging and adjusts the timing to ensure optimal engine performance and efficiency.
Febi - Corporate Logo
T#:382432
Part#: 13627839138
Ships on Jan 11, 2027
$ 53.99 USD
Free Shipping on orders $49 and up
$ 53.99 USD
Free Shipping on orders $49 and up
Referred to as the speed sensor & reference sensor

Febi Camshaft Position Sensor
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:368897
Part#: 12147518628
Ships in 1 Business Day
$ 48.99

This product was last offered at the strikethrough price on
09-01-2026

$ 40.99 USD
Free Shipping on orders $49 and up
$ 40.99 USD
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A faulty cam sensor can lead to issues like difficulty starting and stalling at low speeds. Replacing the cam sensor often resolves many drivability problems. Requires O-ring #12141748398 (not included).
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Meyle Crankshaft Position Sensor - E31, E38, E39, E52, E60, E63, E64,...
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:579358
Part#: 3148990000
Ships on Nov 2, 2026
$ 37.99 USD
Free Shipping on orders $49 and up
$ 37.99 USD
Free Shipping on orders $49 and up
Referred to as the speed sensor & reference sensor
Meyle Crankshaft Position Sensor - M60
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We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:5958675
Part#: 12141731887
Ships on Nov 2, 2026
$ 59.99 USD
Free Shipping on orders $49 and up
Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. The crankshaft position sensor measures the speed at which the crank is turning and adjusts fueling via the ECU to match. If it fails, your computer will not know the speed and will fuel it improperly. Installs exactly in the place of your old sensor and will eliminate your car's idle, performance, and misfiring problems.
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Bosch - Corporate Logo
T#:2857
Part#: 61311373585
In Stock
$ 11.99 USD
Free Shipping on orders $49 and up

If you have a faulty fuel pump relay, fuel will not be pumped to the engine and your engine may not start. Replace your relay with this high quality Bosch replacement to restore fuel pump operation.

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 4 prong relay fits many BMW's and fulfulls a variety of functions. Please check your relay pins configuration to ensure the proper fitment. Fits BMW 2002, e30 e36 e46 e28 e34 e39 e24 e23 e32 e38 e31 z3


This item fits the following BMWs:
1970-1976 2002 BMW 1600 2002 2002tii
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
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 M3
1982-1988 E28 BMW 524td 528e 533i 535i 535is M5
1989-1995 E34 BMW 525i 530i 535i 540i M5
1997-2003 E39 BMW 525i 528i 530i 540i M5
1982-1989 E24 BMW 633csi 635csi M6
1981-1987 E23 BMW 733i 735i
1988-1994 E32 BMW 735i 735il 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
1990-1999 E31 BMW 840i 840ci 850i 850ci 850csi
1997-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M coupe M Roadster

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3 Pin Connector
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:33412931
Part#: 12527519996
In Stock
Sale - Save 25% $ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD
Free Shipping on orders $49 and up

Includes connector housing with terminals and seals. Commonly used for the pencil-style ignition coil connector.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 12527519996 - Commonly used for the pencil-style ignition coil connector.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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3 Pin Connector
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:33412930
Part#: 12521706096
In Stock
Sale - Save 11% $ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 9.78 USD
Free Shipping on orders $49 and up
Sale - Save 11%
$ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 9.78 USD
Free Shipping on orders $49 and up

Includes connector housing with terminals and seals. Commonly used for the idle air control valve (IACV).

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 12521706096 - Commonly used for the idle air control valve (IACV).

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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3 Pin Connector
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:33412947
Part#: 12521433916
In Stock
Sale - Save 25% $ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD
Free Shipping on orders $49 and up

Includes connector housing with terminals and seals. Commonly used for the crankshaft position sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 12521433916 - Commonly used for the crankshaft position sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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3 Pin Connector
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:33412925
Part#: 12521433915
In Stock
Sale - Save 25% $ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD
Free Shipping on orders $49 and up

Includes connector housing with terminals and seals. Commonly used for the engine oil level sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 12521433915 - Commonly used for the engine oil level sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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Febi - Corporate Logo
T#:381815
Part#: 12311268433
In Stock at Vendor
$ 4.07 USD
Free Shipping on orders $49 and up
Reduces alternator vibration.


Febi Relay - Replaces White/Green
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:16375128
Part#: 61368373700
Ships on Jan 11, 2027
Sale - Save 28% $ 15.99

This product was last offered at the strikethrough price on
05-15-2026

$ 11.56 USD
Free Shipping on orders $49 and up
Sale - Save 28%
$ 15.99

This product was last offered at the strikethrough price on
05-15-2026

$ 11.56 USD
Free Shipping on orders $49 and up
This relay is often the fuel pump relay for many BMW models. To ensure the relay is correct for your car please check the pin locations
3 Pin Connector
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:33412924
Part#: 12521433917
Ships on Dec 23, 2026
Sale - Save 18% $ 10.99

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

$ 8.99 USD
Free Shipping on orders $49 and up
Sale - Save 18%
$ 10.99

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

$ 8.99 USD
Free Shipping on orders $49 and up

Includes connector housing with terminals and seals. Commonly used for the camshaft position sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 12521433917 - Commonly used for the camshaft position sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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Bosch - Corporate Logo
T#:592042
Part#: 13627552114
In Stock
$ 30.99

This product was last offered at the strikethrough price on
04-20-2026

$ 22.99 USD
Free Shipping on orders $49 and up
$ 22.99 USD
Free Shipping on orders $49 and up

Crankshaft Pulse Sensor
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:55030835
Part#: 3148100018
In Stock
New Item
$ 15.99 USD
Free Shipping on orders $49 and up
Keep your ultimate driving machine running the way it was engineered to with this reliable replacement.

LK-2M 2 Pin Connector Package
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:40072446
Part#: LK2M
In Stock
Sale - Save 29% $ 6.99

This product was last offered at the strikethrough price on
06-14-2026

$ 4.94 USD
Free Shipping on orders $49 and up
Sale - Save 29%
$ 6.99

This product was last offered at the strikethrough price on
06-14-2026

$ 4.94 USD
Free Shipping on orders $49 and up

Includes connector housing with terminals and seals. Commonly used for the engine oil pressure switch.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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Crankshaft Position Sensor
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:55030834
Part#: 3148100013
In Stock
New Item
$ 36.99 USD
Free Shipping on orders $49 and up
This Meyle Crankshaft Position Sensor is the perfect solution for restoring the critical engine speed data your ECU relies on.

3 Pin Connector
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:33412918
Part#: 12521732596
In Stock
Sale - Save 25% $ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD
Free Shipping on orders $49 and up

Includes connector housing with terminals and seals. Commonly used for the camshaft position sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 12521732596 - Commonly used for the camshaft position sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

Show More Show Less
Bosch - Corporate Logo
T#:54388475
Part#: 13627636937
In Stock
New Item
$ 29.99 USD
Free Shipping on orders $49 and up
Keep your ignition timing razor-sharp and your engine safe from destructive detonation. This replacement Knock Sensor acts as your engine's first line of defense, constantly listening for pre-ignition "pinging" or knocking.
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Bosch - Corporate Logo
T#:2089
Part#: 12141734580
In Stock
$ 77.99

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

$ 65.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 77.99

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

$ 65.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up

Knock sensors detect pings in the engine and adjust ignition timing to restore perfect operation. Faulty knock sensors will throw engine codes or even lead to engine damage. Replace your sensor with a reliable, high quality Bosch sensor to ensure proper engine ignition timing. For cars with M42 Engine.

OEM replacement for BMW part # 12141734580.

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 item fits the following BMWs:
1992-1996 E36 BMW 318i 318is 318ic 318ti

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Bosch - Corporate Logo
T#:583822
Part#: 61311243207
In Stock at Vendor
$ 4.99 USD
Free Shipping on orders $49 and up
This is a brand new starter relay from OEM supplier Bosch. If you have replaced your starter and have ruled out every other issue, this relay could restore your starters operation and get your car back up and running.
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Bosch - Corporate Logo
T#:375327
Part#: 61131372626
In Stock at Vendor
$ 2.03 USD
Free Shipping on orders $49 and up
Bosch - Corporate Logo
T#:29898445
Part#: 13621362599
Ships in 1 Business Day
$ 274.99

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

$ 263.99 USD
Free Shipping on orders $49 and up
$ 263.99 USD
Free Shipping on orders $49 and up
Genuine BMW Temperature-Time Switch


Bapmic - Corporate Logo
T#:54388517
Part#: 61129259425
Ships in 1 Business Day
New Item
$ 126.99 USD
Free Shipping on orders $49 and up
On the track or on the street, your BMW’s electrical architecture demands absolute consistency. A degraded positive battery cable introduces unwanted resistance, leading to weak starts, alternator strain, and erratic module behavior. When it’s time to replace a compromised factory cable, you don’t need over-hyped marketing—you need a part that fits precisely and restores factory grid integrity.
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Bosch - Corporate Logo
T#:639772
Part#: 12417798035N
Ships in 1 Business Day
$ 421.99 USD
Free Shipping on orders $49 and up
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! ​ Bosch Part Number: SR0855N, 0001115045 Replaces the following BMW part numbers: 12417798035
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Bosch - Corporate Logo
T#:596907
Part#: 12417501738
Ships in 1 Business Day
$ 431.15

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

$ 302.51 USD
Free Shipping on orders $49 and up
$ 302.51 USD
Free Shipping on orders $49 and up
If your starter has died and your car will no longer turner over, Bosch's replacement unit is the perfect high quality replacement. OEM replacement for BMW part # 12417501738.

Bosch - Corporate Logo
T#:638550
Part#: 12317560986-14KT
Ships in 1 Business Day
$ 1,145.05 USD
Free Shipping on orders $49 and up
Replace your dead alternator with this remanufactured unit and make sure your battery is being charged properly. When doing any sort of repair or maintenance there is no replacement for original parts. Turner Motorsport carries the OEM Bosch brand with pride and has the parts you need to complete your next project with confidence. Includes a $75.00 core charge to be refunded after we receive your refundable core.
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Bosch - Corporate Logo
T#:596906
Part#: 12411466345
Ships in 1-2 days
$ 280.98 USD
Free Shipping on orders $49 and up
Replacement Starter from Bosch for your 524TD
Knock Sensor
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:55353615
Part#: 12141716055
Ships on Nov 2, 2026
New Item
$ 28.99 USD
Free Shipping on orders $49 and up
This Meyle replacement knock sensor is the perfect solution for keeping your high-performance engine safe and running at its absolute peak.

Meyle Exhaust Camshaft Position Sensor - BMW S54 S62
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:55497462
Part#: 3148000038
Ships in 9 Business Days
New Item
$ 27.99

This product was last offered at the strikethrough price on
09-14-2026

$ 26.99 USD
Free Shipping on orders $49 and up
$ 26.99 USD
Free Shipping on orders $49 and up
Don't let a failing camshaft position sensor rob your vehicle of power or cut your track day short. This Meyle replacement camshaft sensor is built to deliver fast, highly accurate data to the ECU, preventing the performance drops, sluggish throttle response, and rough idling caused by worn-out factory electronics. Engineered to withstand high underhood heat and intense vibrations, it keeps your ignition timing and fuel delivery tightly synced, whether you are daily driving or pushing through high-RPM pulls.
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Oil Pressure Switch
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:5944185
Part#: 12618611273
Ships on Nov 2, 2026
$ 6.99 USD
Free Shipping on orders $49 and up
This Meyle Oil Pressure Switch is the ideal service replacement to keep your BMW or European powerhouse performing reliably on the street or track.

Bosch - Corporate Logo
T#:639763
Part#: 12317616121BKT
Ships on Nov 4, 2026
$ 558.99 USD
Free Shipping on orders $49 and up
$ 558.99 USD
Free Shipping on orders $49 and up
*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! Bosch Part Numbers: AL9450X, 0986UR6231 Replaces the following BMW part numbers: 12317616119, 12317616121
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Bosch - Corporate Logo
T#:1985
Part#: AL0744X
Ships on Nov 4, 2026
$ 362.00 USD
Free Shipping on orders $49 and up

Replacement 105 amp Bosch alternator for the 1992 325i and 325is. There are several potential alternators for the 1992 325i/325is. If yours is marked as 105 amp, and you'd like to use the original style alternator, this is most likely the one you require.

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:
1992-1992 E36 3 series 325 & 325is (no convertibles)

Includes $75.00 core charge to be refunded on return of your rebuildable core.

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Bosch - Corporate Logo
T#:57267768
Part#: 12317616126
Special Order: No Guaranteed ETA
New Item
$ 571.99 USD
Free Shipping on orders $49 and up
Keep your BMW's vital electronics powered and your engine running at peak efficiency with a premium remanufactured alternator from Bosch.
Bosch - Corporate Logo
T#:1675
Part#: AL0741X
Ships on Nov 4, 2026
$ 389.99 USD
Free Shipping on orders $49 and up

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.

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:
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.

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Bosch - Corporate Logo
T#:57231540
Part#: 12311466084
Special Order: No Guaranteed ETA
New Item
$ 286.99 USD
Free Shipping on orders $49 and up
Ensure your BMW or European vehicle maintains uninterrupted power under demanding driving conditions with this premium remanufactured alternator by Bosch.
Bosch - Corporate Logo
T#:639737
Part#: 12417618620BKT
Ships on Nov 4, 2026
$ 386.99

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

$ 355.99 USD
Free Shipping on orders $49 and up
$ 355.99 USD
Free Shipping on orders $49 and up
*Price includes a refundable $75 Core Charge* 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! ​ Bosch Part Numbers: SR9523X, 0986UR1770 Replaces the following BMW part numbers: 12417612815, 12417618620
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