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BMW E30 M3 Electrical Sensors, Switches, & Relays

BMW E30 M3 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 (E30) M3 1988-1991. Reset your chassis
For accurate results, specify your model below.
OEM Bosch Coolant Temperature Sensor - E36 318i 325i M3 1992-1995, E30, E34, E28, E24

To make sure your temperature readings are as accurate as possible, replace your temperature sensor with a high quality OEM Bosch temperature sensor.

OEM replacement for BMW part # 13621709967, 13621709966, and 13621284397. Bosch coolant temperature sensor mounted in the cylinder head on models with the M42, M50 and S50 engines.

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:
1988-1991 E30 BMW 318i 318is 318ic M3
1992-1995 E36 BMW 318i 318is 318ti 318ic 325i 325is 325ic M3
3/1987-1988 E28 BMW 528e
1985-1988 E28 BMW535i 535is M5
1989-1995 E34 BMW 525i 535i M5
1985-1989 E24 BMW 635csi M6
1984-1987 E23 BMW 735i
1988-1992 E32 BMW 735i 735il

Part #: 13621709967
Price: $19.95 (USD) 
Quantity:   
Part #: PS-METKIT
Price: $15.99 (USD) 
Quantity:   
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
Part #: 61368373700
Price: $14.59 (USD) 
Quantity:   
Fuse Box Cover - E30 E24 E23 This is the Genuine BMW clear plastic fuse box cover for E30 3 series, E24 6 series and E23 7 series. The cover in embossed with fuse and relay locations for ease of use.

This item fits the following BMWs:
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
1983-1989 E24 BMW 633csi 635csi M6
1983-1987 E23 BMW 733i 735i
Part #: 61131368802
Price: $33.95 (USD) 
Quantity:   
Voltage Regulator (Valeo Alternator) - 12311739193 - E30,E36 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.

This is the OEM Valeo voltage regulator and it only fits to the Valeo alternator (the Bosch voltage regulator is very different).
Part #: 12311739193
Price: $146.99 (USD) 
$171.70 (14% off MSRP)
Quantity:   
HARD Motorsport Battery Disconnect / Kill Switch Sticker Hard Motorsport Batter disconnect sticker required by many motorsports sanctioning bodies.
Part #: HARD.BATTSTICKER
Price: $3.75 (USD) 
$5.00
Limited Qty Sale
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Relay - Black 7-prong - Fuel Pump Relay This is the fuel pump relay for some E21, E23, E24, E28, and E30 models. The fuel pump relay gets power from the main relay and then powers on the fuel pump. If your fuel pump is not powering on (a buzzing noise is the telltale sign) then the relay may be at fault. It's easy to test with a jumper wire and test light. 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.

According to BMW, this part supercedes these previous BMW relay part numbers: 12621735424, 12631735424, 12631378238, 61311459577 and Bosch part number 0 332 019 456. However, see the note below when replacing a 4 or 5-prong relay)!

Note: this is a 7-prong relay that should only be used to replace a relay with similar wiring. The BMW ETK and RealOEM (and other sites) call for this relay in place of the factory 4 or 5 prong relays but that is not always the case. The 7-prong relay requires an RPM signal to energize the fuel pump and most cars that used a 4 pin relay do not have that signal so the pump will never turn on. If you are replacing a E30 4-pin relay first try the green relay #61368373700. It's more likely the better option (and cheaper).

Please remember that electrical parts are not returnable.
Part #: 13631276264
Price: $39.95 (USD) 
Quantity:   
E30 M3, E24 635CSi TDC Reference Sensor This is a reference sensor used for crank position signal for the E24 635 and a top dead center signal for the E30 M3.

The E24 can have a crank position sensor (CPS) in one of two places: mounted in the transmission bellhousing reading the flywheel (early cars) or on the front of the engine block reading the teeth on the front crank pulley (later cars). The BMW parts information does not show a clear cutoff for each so check your car before ordering. The CPS sends a position signal to the DME so the computer knows when the engine is at TDC and can start the car. It's also when the engine is running for ignition timing. If your engine is not starting or running with misfires this is definitely one of the likely causes. Keep one as a spare to avoid downtime or being stranded!

This also sends a TDC signal in the E30 M3 but it's only used during diagnostic tests. The sensor is located on the upper transmission bellhousing, separate from the other reference sensors. It's only sending a signal to the diagnostic connector, not to the ECU itself. One of the problems with these reference sensors is that they all look alike, especially the male pin connectors on the body of the car. The TDC reference sensor itself is shorter and stubbier than the other two sensors on the M3 bellhousing. Unlike the other two sensors it does not have any markings or special features, just a plain black connector. And it's often missing from the car because it is not required to run and previous owners may have removed it to eliminate confusion.

This item fits the following BMWs:
1988-1991 E30 BMW M3
6/1987-1989 E24 BMW 635csi
Part #: 12521287784
Price: $207.95 (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

Part #: 61311373585
Price: $12.95 (USD) 
Quantity:   
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.
Part #: 61361729004
Price: $14.59 (USD) 
Quantity:   
OEM Bosch Flywheel Reference Sensor (Cyl ID, CPS, RPM) - E23, E24, E28, E30 M3

This is the flywheel reference sensor used on many 1980s BMW models, including E23, E24, E28, and E30 M3. There are usually 2-3 reference sensors mounted on the transmission bellhousing and this one part number is used for both sensors. BMW changed to one sensor part number that covers both of the old numbers (the only difference was the length of the cables). Even though the sensors are the same the ECU is interpreting their data differently. One is used for reading RPM and the other is for crankshaft position or cylinder identification (depending on the model). If the ECU cannot detect crankshaft position or rotation it will not trigger the ignition and start the car. Or if the signal is poor the engine could have misfires and poor running. So this is a vital sensor that you should not neglect! You might even want to keep a spare in your car or toolbox.

On the E30 M3 (and possibly others) the old sensors were referenced by markings on the sensor plug. Since the new BMW part number covers both sensors it might be a good idea to mark both ends yourself to help in identification later.

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!

BMW part numbers 12141708619 and 1214708618 are now interchangable with 12141730773.

This item fits the following BMWs:
1988-1991 E30 BMW M3
1982-1988 E28 BMW 533i 535i 535is
1982-6/1987 E24 BMW 633csi 635csi
1988-1989 E24 BMW M6
1982-1987 E23 BMW 733i 735i

Part #: 12141708619
Price: $67.95 (USD) 
Quantity:   
Oil Temperature Sensor And Gauge Kit

The EVO series from ProSport Gauges is an award winning, industry leading option for those looking to push their car's limits. They allowing you to monitor crucial engine functions in one quick glance with advanced precision. Featuring a dual color readout, you can customize your readout to your liking. Offering a user friendly readout with a digital reading in the center with a bar-graph style sweep around the gauge as well. 

Kit Includes:

  • Digital Oil Temperature Guage (100-300 degrees) 
  • Turner oil sensor flange
  • Instructions
  • Mounting hardware
  • Decals
  • Temperature sender - 1" long with 1/8" NPT threads
  • Dual color display (Blue or Red)

**Includes Turner oil level sensor flange!**

Part #: oiltempgaugeBRKT
Price: $155.94 (USD) 
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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.
Part #: EA-462
Price: $69.95 (USD) 
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Turner Motorsport Oil Temperature Sensor Flange

The Turner Motorsport Oil Temperature Sensor Flange was designed to get your oil temperature from the best possible location: the sump. Most of the factory and aftermarket sensors are located after the oil pump, which does not give you an accurate temp reading of the oil that is actually lubricating the engine. At the factory temp sensor location the sensor picks up heat not only from the oil stream, but also from the oil pump and housing which will skew the reading. Other aftermarket adapters can be give inaccurate readings from their location and/or design limitations. And may require making unnecessary modifications. By relocating the sensor to the oil sump it reduces clutter and sits flush against the bottom of the oil pan to avoid potential clearance issues. Testing that we have done on and off the track shows that the sump location is the most accurate. We accomplish this by removing the factory oil level sensor or block off plate and using the existing hole and bolt pattern on the oil pan with no additional modifications. Any sensor with an M12 x 1.50mm thread can be used in the flange. 

Note that removing the factory oil level sensor will trigger the low oil fault/warning light. There's no elegant way around this but since the Temp Flange is considered a race-only part we assume you will be checking your own oil level anyway or be using a stand-alone dash/engine management system that does not track oil level. And having the most accurate oil temp is more important.

Applications:
1987-1991 E30 M3
1992-1999 3 Series E36 M3 3.0 and M3 3.2 Euro Models Only!
1999-2006 3 Series E46 All
1991-1995 5 Series E34 525i M50
1997-2003 5 Series E39 525i, 528i, 530i, 540i, 540iP, M5
2004-xxxx 5 Series E60 525i, 530i
1995-2001 7 Series E38 
Z3 2.5, 2.5i, 2.8, 3.0i, M3.2 S54
Z4 2.5, 3.0
Z8 All

Part #: TEN9990001
Price: $79.95 (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!

Part #: 13631703562
Price: $64.95 (USD) 
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