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BMW E31 Electrical Sensors, Switches, & Relays

BMW E31 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.
You're currently viewing parts for your BMW 8 Series. Reset your chassis
For accurate results, specify your model below.
Coolant Temperature Sensor - E36, E34, E32, E38, E31 This is the engine coolant temperature sensor that is mounted into the cylinder head.
FAE
Part #: 12621747281
Price: $25.95 (USD) 
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Prosport Performance
Part #: PS-METKIT
Price: $15.99 (USD) 
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Throttle Position Switch - E36 93-99, E34 E32 E38 E39 Z3

This throttle position switch - TPS - ( also known as the throttle valve switch) that provides the throttle position information to the DME. A faulty switch will often cause hesitation, stalling or idle problems. Often a Check Engine Light (CEL) will be set. Restore your vehicles smooth operation with this high quality OEM Hella replacement.

Hella is a premium manufacturer that supplies automotive parts to numerous car brands across the world. Everything from electrical to mechanical genuine parts have been made and supplied directly to BMW before the vehicles ever leave the production floor. Their high quality, long lasting parts have made them a trusted brand chosen to help keep your BMW on the road for many years to come.

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:
1989-1991 E30 BMW 318i 318is 318ic
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1991-1995 E34 BMW 525i 530i 535i 540i M5
1997-1998 E39 BMW 528i 540i
1993-1994 E32 BMW 740i 740ill
1995-1998 E38 BMW 740i 740il
1990-1999 E31 BMW 840i 840ci
1997-1998 Z3 BMW Z3 1.9 Z3 2.8
1998-2000 Z3 BMW M Roadster M Coupe (S52)

Hella
Part #: 13631726591
Price: $51.95 (USD) 
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Camshaft / Crankshaft Sensor O-Ring This is the o-ring used for most BMW camshaft sensors and crankshaft sensors. Although most sensors that we sell come with this o-ring at no charge, they may be the source of oil or fluid leaks. Simply replacing the o-ring, rather than replacing the whole sensor, is preferred. Fits with many BMW models and multiple cam, crank, and pulse generator sensors.

Sold per o-ring.
Rein
Part #: 12141748398
Price: $1.95 (USD) 
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Genuine BMW Ignition Switch - 61321383365 - E36,E36 M3 This is the ignition switch with harness for the E36 3 series thru 1/1995. If replacing the ignition lock cylinder you may want to check the harness to ensure it is functioning properly.

This item fits the following BMWs:
1992-1/1995 E36 BMW 318i 318is 318ic 325i 325is 325ic M3
1990-1999 E31 BMW 840i 840ci 850i 850ci 850csi
Genuine BMW
Part #: 61321383365
Price: $71.73 (USD) 
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HARD Motorsport Battery Disconnect / Kill Switch Sticker Hard Motorsport Batter disconnect sticker required by many motorsports sanctioning bodies.
HARD Motorsport
Part #: HARD.BATTSTICKER
Price: $4.50 (USD) 
$5.00 (Sale - Save 10%)
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E31, E36, Z3 Crash Alarm Relay This is a new BMW Crash Alarm Relay. In the event of an impact this relay automatically turns on your hazard lights, cuts fuel delivery, and enables the airbags. But they are known to fail just like any other relay and that can cause problems. Telltale signs that this has gone bad is your hazard lights will flash every time you turn the car on (pressing the button will stop them), the hazard lights will turn on while driving, the airbag/SRS light will be on in the dash, the alarm might activate on its own, and possibly other symptoms. If you have any of those issues this could be the culprit. Replacement is easy and the crash alarm relay is located either in the engine compartment with the other relays or under the steering column.

This part replaces the original BMW part number 61351384761 and 61351384732.

This item fits the following BMWs:
1992-1999 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1990-1999 E31 BMW 840i 840ci 850i 850ci 850csi
1997-2002 Z3 BMW Z3 2.5i Z3 3.0i M Roadster M Coupe
Genuine BMW
Part #: 61358364692
Price: $45.55 (USD) 
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OEM Bosch Fuel Pump Relay -- e30 e36 e46 e28 e34 e39 e24 e23 e32 e38 e31 z3

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

Bosch
Part #: 61311373585
Price: $12.95 (USD) 
Quantity:   
Genuine BMW Crankshaft Speed Sensor - 12141729292 - E38

Genuine BMW Crankshaft Speed Sensor -
This item fits the following BMW Chassis:
E38

Fits BMW Engines including:
M60

Genuine BMW
Part #: 12141729292
Price: $122.38 (USD) 
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Genuine BMW Bushing Contact - 61130005199

Used in a variety of locations throughout your BMW, this perfect for repair damage electrical connection contacts.

GENUINE BMW CHASSIS ELECTRICAL BUSHING CONTACT 61130005199

Genuine BMW
Part #: 61130005199
Price: $3.31 (USD) 
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Relay - White Green - Most BMWs 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. The following are alternate part numbers for this item. 12631735424, 61368366600, 12631714976, 61311350315, 61311378297, 61361378238, 61360153636.

This item fits the following BMWs:
2008+ E82 BMW 128i 135i 1M Coupe
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
2006-2012 E90 BMW 325i 325xi 328i 328xi 328i xDrive 330i 330xi 335d 335i 335xi 335i xDrive M3 - Sedan
2006-2012 E91 BMW 325xi 328i 328xi 328i xDrive - Wagon
2007-2013 E92 BMW 328i 328xi 328i xDrive 335i 335is 335xi 335i xDrive M3 - Coupe
2007-2013 E93 BMW 328i 335i M3 - Convertible
1989-1995 E34 BMW 525i 530i 535i 540i M5
1997-2003 E39 BMW 525i 528i 530i 540i M5
2004-2010 E60 BMW 525i 525xi 530i 530xi 528i 528xi 528i xDrive 535i 535xi 535i xDrive 545i 550i M5
2004-2011 E63 BMW 645ci 650i M6
1988-1994 E32 BMW 735i 735il 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
2002-2008 E65 BMW 745i 745li 750i 750li 760i 760li
1990-1999 E31 BMW 840i 840ci 850i 850ci 850csi
2004-2010 E83 BMW X3 2.5i X3 3.0i X3 3.0si
2000-2006 E53 BMW X5 3.0i X5 4.4i X5 4.6is X5 4.8is
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive35d X5 xDrive35i X5 xDrive48i X5M
2008+ E71 BMW X6 xDrive35i X6 xDrive50i X6M
1997-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si Z4 M Roadster M Coupe
Genuine BMW
Part #: 61368373700
Price: $16.21 (USD) 
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Genuine BMW Relay In Zinc Yellow - 61361389105 - E34,E36,E46,E83

Genuine BMW Relay In Zinc Yellow
This item fits the following BMW Chassis:
E36 M3,E34 M5,E46 M3,E34,E36,E46,E83 X3

Genuine BMW
Part #: 61361389105
Price: $16.21 (USD) 
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Camshaft Sensor - E39 540i E38 740i/il 1997-1998 This cam position sensor provides input to the ECU. It fits BMW e39 540i E38 740i 740il E31 840ci 1997-1998.

This item fits the following BMWs:
1997-1998 E39 BMW 540i
1997-1998 E38 BMW 740i 740il
1997-1998 E31 BMW 840ci
Pex
Part #: 12141742185
Price: $109.95 (USD) 
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Intake Air Temperature Sensor - E36 E34 E38 E32 E31 Replace your faulty fuel injection intake air temperature sensor with this OEM sensor. The intake manifold air temperature sensor provides information to the fuel injection system. It is typically mounted in the intake manifold on cars with the M50 and M60 engines.

This item fits the following BMWs:
1992-1995 E36 BMW 325i 325is 325ic M3
1989-1995 E34 BMW 525i 530i 540i M5
1988-1994 E32 BMW 735i 735il 740i 740il 750il
1995-1996 E38 BMW 740i 740il
1990-1992 E31 BMW 840i 840ci 850i 850ci 850csi
Beru
Part #: 13621725323
Price: $14.95 (USD) 
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Coolant Temperature Sensor - M52/S52, M62, M73, M54, S62 This is the coolant temperature sensor used in many BMW models from the mid-1990s to the mid-2000s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer.

This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement.

This coolant temp sensor fits the following BMWs:
1996-1999 E36 BMW 323is 323ic 328i 328is 328ic M3, located in cylinder head
1999-2003 E39 BMW 540i, located on side of water pump
1999-2001 E38 BMW 740i 740il, located on side of water pump
1995-1996 E38 BMW 750il, located on side of water pump
1990-1999 E31 BMW 850i 850ci, located on side of water pump
2000-2006 E53 BMW X5 3.0i, located in cylinder head
2000-2006 E53 BMW X5 4.4i/4.6is/4.8is, located on side of water pump
1997-2002 Z3 BMW Z3 2.5i Z3 3.0i, located in cylinder head
Genuine BMW
Part #: 13621703993
Price: $41.05 (USD) 
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Genuine BMW Adapter Voice Recogn. - 84110018038

Genuine BMW Adapter - Voice Recogn.

Genuine BMW
Part #: 84110018038
Price: $10.00 (USD) 
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Oil Pressure Switch - E39 540i, E38 740i/il, E60 M5, E63 M6 This genuine BMW oil pressure switch is mounted on the oil filter housing on cars with M60, M62 V8 engines. , M70, M73 V12 engines and S85 V10 engines. Replaces BMW part number 12611731499.

This item fits the following BMWs:
1997 E39 BMW 540i
2006-2010 E60 BMW M5
2006-2010 E63 BMW M6
1988-1994 E32 BMW 750il
1995-1997 E38 BMW 740i 740il 750il
1990-1997 E31 BMW 840i 840ci 850i 850ci 850csi
Genuine BMW
Part #: 12611715504
Price: $31.77 (USD) 
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OEM Hella Oil Level Indicator Switch -- E34 E32 E31 M60 M70 M73 S70

This important sensor detects the oil level in your oil pan. If the sensor dies or has a fault, this can give you inaccurate level readings. This can be very hazardous if the oil level were to fall below a certain amount and went undetected. Oil starvation could lead to oil pump failure and extra wear, tear, and heat in the moving components, leading to engine seizure and complete failure. To ensure your engine is well looked after, we recommend this OEM Hella Level Indicator. OEM replacement for BMW part # 12611704468 and 12611747119.

Hella is a premium manufacturer that supplies automotive parts to numerous car brands across the world. Everything from electrical to mechanical genuine parts have been made and supplied directly to BMW before the vehicles ever leave the production floor. Their high quality, long lasting parts have made them a trusted brand chosen to help keep your BMW on the road for many years to come.

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!

Hella
Part #: 12611704468
Price: $97.99 (USD) 
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Facet
Part #: 12141729292
Price: $42.70 (USD) 
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Main / ECU Relay - White - E30 E36 E39 E38 X5 This is a Genuine BMW main relay for a variety of BMW models. The main relay powers vital systems in the car when the key is turned to the Start position. Things like the ECU and fuel pump require power from the main relay before they can work. The main relay is constantly powered so checking for power is easy with a test light. It should also make a 'click' sound when the ignition switch is turned. Note: relays look similar but can perform different functions, and electrical parts are non-returnable, so make sure you confirm this is the relay you need.
Genuine BMW
Part #: 61361729004
Price: $16.21 (USD) 
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OEM Bosch BMW Knock Sensor - M62 E39 E38 E31

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.

Bosch # 12141741648 OEM replacement for BMW part # 12141741648.

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 s  eupplied 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!

Fits the following vehicles:
1996-09/1999 E39 BMW 540i
1995-09/1999 E38 BMW 740i 740iL
1990-1999 E31 BMW 840Ci

Bosch
Part #: 12141741648
Price: $89.95 (USD) 
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Turner Plug-and-Play IAT Relocation Kit

All vehicles will lose some degree of performance due to heat soak under the right operating conditions.  Engine management systems constantly monitor operating conditions and modifying parameters based on sensor inputs. BMW integrated the intake air temp sensor in the MAF housing on models such as the E39 M5, and, being sandwiched behind a hot radiator and in some applications next to an even hotter valve cover, this is less than ideal for performance applications. Absorbing excess heat from its surroundings, the MAF can’t shed it fast enough, and the ECU reads an inaccurately high intake air temperature. Compensating for this false hot air measurement, the ECU pulls timing and runs a richer fuel mixture, resulting in a significant loss of torque.

What can you do?  Locate an intake air temp sensor in a location where it can properly measure incoming air temps and where it's less prone to heat soak. Mounting the sensor further away from the heat source and isolating it from the MAF housing, it can both resist the effects of heat soak longer and respond to temperature changes more quickly.  The result is you’ll experience reduced torque loss and more consistent power output when you’re pushing your engine hard. 

The Turner engineering team was initially skeptical of the claimed performance benefits of this modification. They first set out validate the functionality and performance benefit of a temp sensor relocation. Replicating stop-and-go traffic heat soak in a 2001 540i was a simple task in a controlled environment - their dynometer. First the car was heat soaked to simulate being stuck in traffic or moving at low speeds by running the car four times on the dyno with the dyno's cooling fans disabled. The fans were then turned on for three more runs to observe the recovery rate once air flow was reintroduced. The test: following this procedure once with a stock IAT, and once with their relocation kit in place. 

The result? Turner recovered 11lb-ft torque at 2500rpm through use of their relocation kit, with even greater recovery to be found for M5 owners. Here are the heat soak-related torque losses Turner experienced:

Stock IAT location:
18rwtq at 2500rpm
10rwtq at 3000rpm
9rwtq at 3700rpm

Turner IAT Relocation:
7rwtq at 2500rpm
5rwtq at 3000rpm
5rwtq at 3700rpm

**Click here for installation instructions**

The Turner engineering team designed a complete plug and play kit (unlike all other options on the market) that makes for quick, easy, and reversible installation. Weather-sealed connectors keep out the elements, while sheathed wiring offers a clean appearance underhood. With a harness nearly 3 feet long - the Turner IAT relocation kit offers flexibility in positioning, but not too long that you're left with unsightly excess wiring. Turner recommends positioning the sensor in a location away from engine heat, but still within the intake ducting to achieve accurate intake temp readings - such as the far side of the base of the airbox. Vehicles with cold air intakes with cone-style filters can even position the sensor in the end of the filter. Simply drill a hole in your (cool) location of choice and plug in the harness. More information including installation instructions and some good examples of sensor mounting locations can be found in our DIY PDF. 

We include everything you need to relocate your IAT, just select your desired sensor brand below - Genuine BMW or original equipment Beru.

Also the perfect plug-n-play option for anyone looking to upgrade their intake to utilize an Alpha-N tune!

Note for vehicles with M62 engine: applicable to 1999 and up

Turner Motorsport
Part #: 014579TMS
Price: $87.20 (USD) 
$99.95 (Sale - Save 13%)
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OMP Battery Cut Off Switch / Kill Switch OMP Battery Cut Off Switch / Kill Switch, for use in racecars as an emergency "kill switch", to depower the electrical system in the event of a crash or other emergency. This cut off switch is FIA approved, has 6 poles and alternator protection, as well as a removable key.
OMP
Part #: EA-462
Price: $69.95 (USD) 
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OEM Hella BMW Fuel Throttle Valve Switch -- E30 E36 E34 E39 E32 E38 E31

Located on the secondary throttle housing tube for the ASC+T system, this is important to ensure this system functions properly. Made by the manufacturer who supplied these parts directly to BMW, you trust the quality is the same as or higher than the genuine BMW part and the cost significantly lower.

Hella is a premium manufacturer that supplies automotive parts to numerous car brands across the world. Everything from electrical to mechanical genuine parts have been made and supplied directly to BMW before the vehicles ever leave the production floor. Their high quality, long lasting parts have made them a trusted brand chosen to help keep your BMW on the road for many years to come.

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!

Hella
Part #: 13631703562
Price: $64.95 (USD) 
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OEM Hella Crankshaft Position Sensor - in Bell Housing - E9X M3 E39 540i M5 E60 M5 E63 M6 E38 740i

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.

Hella is a premium manufacturer that supplies automotive parts to numerous car brands across the world. Everything from electrical to mechanical genuine parts have been made and supplied directly to BMW before the vehicles ever leave the production floor. Their high quality, long lasting parts have made them a trusted brand chosen to help keep your BMW on the road for many years to come.

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:
2008+ E9X BMW M3
1997-2003 E39 BMW 540i M5
2006-2010 E60 BMW M5
2006+ E63 BMW M6
1997-2001 E38 BMW 740i 740il 750il
1997-1998 E31 BMW 840ci 850ci
2000-2003 E52 BMW Z8

Hella
Part #: 13627839138
Price: $39.34 (USD) 
$77.95
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