BMW Electrical Sensors, Switches, & Relays for BMW 3 Series E30 (1984-1991)

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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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Genuine BMW - Corporate Logo
T#:38825
Part#: 12311711375
Ships in 9 Business Days
$ 1,452.99 USD
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$ 1,452.99 USD
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Price includes $180.00 core charge.
Genuine BMW - Corporate Logo
T#:6699718
Part#: 12312287828KT
Ships in 7 Business Days
$ 1,217.99 USD
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$ 1,217.99 USD
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Price includes refundable $200 core charge
Braille - Corporate Logo
T#:558046
Part#: G30
Ships in 6 Business Days
$ 522.99 USD
Free Shipping on orders $49 and up
The G30 lithium battery from Braille is designed for the Import Tuner market (4 and 6 cylinder) for track use and has enough power for small black V8 race cars and hot rods with light electrical demands/accessories and standard compression. The G30 comes in the popular ETX 30 Group size, just like the B3121 AGM, so it is small and light enough to mount in a variety of locations. Incorporated in this battery is the same technology used in their race winning batteries used by nearly every OEM developer in classes ranging from SCCA to Formula 1.
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Genuine BMW - Corporate Logo
T#:139797
Part#: 61131370763
Ships in 4 Business Days
3% off MSRP $ 472.99

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

$ 457.99 USD
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3% off MSRP
$ 472.99

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

$ 457.99 USD
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Genuine BMW Fuse Box
This item fits the following BMW Chassis:
E30 M3,E30


Genuine BMW Oil level sensor - E30 325i 325is 325e 325 325es ...
For vehicles with production date up 09/1987
Genuine BMW - Corporate Logo
T#:22420
Part#: 12611277240
Ships in 9 Business Days
6% off MSRP $ 414.99

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

$ 390.99 USD
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6% off MSRP
$ 414.99

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

$ 390.99 USD
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Genuine BMW Levelling Switch -
This item fits the following BMW Chassis:
E30

Fits BMW Engines including:
M20

Genuine BMW - Corporate Logo
T#:367860
Part#: 13631710559
Ships in 4 Business Days
6% off MSRP $ 381.99

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

$ 359.99 USD
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6% off MSRP
$ 381.99

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

$ 359.99 USD
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Enhance the performance of your BMW equipped with M20 or M50 engines with the Turner Motorsport Genuine Throttle Position Sensor. Over time, the throttle position sensor can deteriorate, affecting the vehicle's driveability. Replace it with a new, genuine BMW sensor to ensure optimal performance and responsiveness.

  • Genuine BMW part guarantees quality and compatibility
  • Restores accurate throttle response
  • Ensures proper engine performance and drivability
  • Easy installation for hassle-free maintenance
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Bosch - Corporate Logo
T#:3471789
Part#: 124123547095KT
Back Ordered
$ 346.99

This product was last offered at the strikethrough price on
04-09-2026

$ 340.99 USD
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$ 340.99 USD
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Price Included a $40.00 Core Charge
Genuine BMW - Corporate Logo
T#:7114
Part#: 12141721504
Ships in 4 Business Days
6% off MSRP $ 337.99

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

$ 318.99 USD
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6% off MSRP
$ 337.99

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

$ 318.99 USD
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This Genuine BMW crankshaft position sensor / pulse generator mounts into the front timing cover of the M42 engine to provide a signal to the DME computer.
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:
1989-1991 E30 BMW 318i 318is 318ic
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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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Bosch - Corporate Logo
T#:338004
Part#: 12411712937
Ships on Sep 24, 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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Genuine BMW - Corporate Logo
T#:19368
Part#: 12521287784
Ships in 4 Business Days
6% off MSRP $ 299.99

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

$ 282.99 USD
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6% off MSRP
$ 299.99

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

$ 282.99 USD
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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.

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:
1988-1991 E30 BMW M3
6/1987-1989 E24 BMW 635csi
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Braille - Corporate Logo
T#:558042
Part#: B3121
Ships in 6 Business Days
$ 270.99 USD
Free Shipping on orders $49 and up
When building a car for the track, one of the most important factors to consider is weight. Stock batteries can weigh up to almost 50 pounds and are unnecessarily large, designed to power a host of systems not normally used in a track car (radios, lighting, etc.). What can you do to cut weight the weight without affecting your car's operation? This is where Braille Battery comes in with their long line of performance lightweight battery options! Designed to provide the highest cranking power possible while being up to 75% lighter, Braille Battery is one of the foremost leaders in automotive racing batteries with nothing but high quality, high output batteries in mind! The B3121 battery from Braille is their lightest do-everything battery available, offering 1380 pulse cranking amps that can crank over V8 engines with ease while still coming in at under 22 pounds, half of the weight of a standard Group 34 battery! This is thanks to their Advanced AGM racing technology that allows them to put a ton of power into a very small package. Physical Specifications: BCI Group: All sizes Weight: 21lbs / 9.5kg Length: 6.6" / 168mm Width: 5.2" / 132mm Height: 6.8" / 173mm Polarity: Right Side Positive Terminal Type: Steel terminal block with M6 bolt Performance Specifications: Voltage: 12v Recharge Voltage: 14.4V – 14.6V Maintenance charge voltage: 13.8V 5s Pulse Cranking Amps (PCA): 1380 10s PDC: 124 Amp Hour (Ah): 31 Watt Hour (Wh): 372 Life Cycle @ 10% DOD: 3100 Charging Temperature 0C to 50C Discharge Temperature range -40C to +60C Storage temperature -40C to +60C *THIS BATTERY REQUIRES A CUSTOM MOUNTING SOLUTION. The size and weight are significantly smaller than a stock battery and will not be held in place by the stock battery mount*
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Bosch - Corporate Logo
T#:29898445
Part#: 13621362599
Ships in 2 Business Days
$ 283.99

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

$ 266.99 USD
Free Shipping on orders $49 and up
$ 266.99 USD
Free Shipping on orders $49 and up
Genuine BMW Temperature-Time Switch
Bosch - Corporate Logo
T#:2278
Part#: SR43X
Ships in 1 Business Day
$ 258.99

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

$ 252.99 USD
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$ 252.99 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 fits the following BMWs:
1984-1985 E30 3 Series 323i 325e 325es
1982-12/1986 E28 5 Series 528e
1977-1983E21 3 Series 320/6 323i

 

Includes $45.00 core charge to be refunded on return of your rebuildable core.

 

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Genuine BMW Temperature Sensor
For vehicles with a production date from 01/1983
Genuine BMW - Corporate Logo
T#:200307
Part#: 13621362599
Ships in 4 Business Days
5% off MSRP $ 255.99

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

$ 241.99 USD
Free Shipping
5% off MSRP
$ 255.99

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

$ 241.99 USD
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Genuine BMW Temperature-Time Switch

Braille - Corporate Logo
T#:558038
Part#: B2015
Ships in 7 Business Days
$ 237.99 USD
Free Shipping on orders $49 and up
When building a car for the track, one of the most important factors to consider is weight. Stock batteries can weigh up to almost 50 pounds and are unnecessarily large, designed to power a host of systems not normally used in a track car (radios, lighting, etc.). What can you do to cut weight the weight without affecting your cars operation? This is where Braille Battery comes in with their long line of performance lightweight battery options! Designed to provide the highest cranking power possible while being up to 75% lighter, Braille Battery is one of the foremost leaders in automotive racing batteries with nothing but high quality, high output batteries in mind! The B2015 is Braille's most popular non-carbon racing battery and is able to start larger engines easily for racing and offers daily driving capability for most 4 and 6 cylinders engine vehicles. Physical Specifications: BCI Group: All sizes Weight: 15lbs / 6.8kg Length: 6.8" / 173mm Width: 3.4" / 86mm Height: 6.1" / 155mm Polarity: Right Side Positive Performance Specifications: Voltage: 12 Full Charge Voltage: 13.2 Pulse Cranking Amps (PCA): 1067 Amp Hour (AH): 21 Life Cycle @ 10% DOD: 3100 *THIS BATTERY REQUIRES A CUSTOM MOUNTING SOLUTION. The size and weight are significantly smaller than a stock battery and will not be held in place by the stock battery mount*
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Genuine BMW - Corporate Logo
T#:205376
Part#: 12121722570
In Stock
Sale - Save 8% $ 246.99

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

$ 226.99 USD
Limited Qty Sale
Free Shipping
Sale - Save 8%
$ 246.99

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

$ 226.99 USD
Limited Qty Sale
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Genuine Bmw Pulse Generator -12121722570
Genuine BMW - Corporate Logo
T#:366899
Part#: 12141730773
Ships in 4 Business Days
5% off MSRP $ 240.00

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

$ 226.99 USD
Free Shipping on orders $49 and up
5% off MSRP
$ 240.00

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

$ 226.99 USD
Free Shipping on orders $49 and up

This flywheel position sensor provides the ECU with the engine speed signal. There are 2 of these sensors per car. Sold individually.
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:
1986-1987 E30 BMW 325e 325es
1986-12/1986 E28 BMW 528e

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Innovate Motorsports - Corporate Logo
T#:28836410
Part#: 38770
In Stock at Vendor
$ 212.99 USD
Free Shipping on orders $49 and up

Features & Benefits:

Two configurable linear 0-5V analog outputs Ability to calibrate O2 sensors for maximum accuracy Includes LC-2 controller and Bosch wideband O2 sensor Comes with a program cable, manual, and a 10 ft. sensor cable Includes a 1-inch mild steel exhaust bung Innovate MTS serial in/out capability Integrated dual-color status LED (green/red) Patented DirectDigital™ wideband sensor control Positive lock connectors for all connections Real-time display data on screen or with the powerful LogWorks software Range:

AFR (Air-Fuel Ratio) range from 7.4:1 to 22.4:1 (0.5 to 1.5 lambda)

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Genuine BMW - Corporate Logo
T#:185063
Part#: 12141720856
Ships in 3 Business Days
6% off MSRP $ 217.99

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

$ 205.99 USD
Free Shipping
6% off MSRP
$ 217.99

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

$ 205.99 USD
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This item has been superseded to 12141720852

Braille - Corporate Logo
T#:558037
Part#: B14115
Ships in 5 Business Days
$ 204.99 USD
Free Shipping on orders $49 and up
When building a car for the track, one of the most important factors to consider is weight. Stock batteries can weigh up to almost 50 pounds and are unnecessarily large, designed to power a host of systems not normally used in a track car (radios, lighting, etc.). What can you do to cut weight the weight without affecting your cars operation? This is where Braille Battery comes in with their long line of performance lightweight battery options! Designed to provide the highest cranking power possible while being up to 75% lighter, Braille Battery is one of the foremost leaders in automotive racing batteries with nothing but high quality, high output batteries in mind!
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Packaged by Turner - Corporate Logo
T#:401689
Part#: OILTEMPGAUGEBRKK
Ships on Jan 11, 2027
Sale - Save 2% $ 196.99

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

$ 193.26 USD
Free Shipping
Sale - Save 2%
$ 196.99

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

$ 193.26 USD
Free Shipping
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.
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Remanufactured Alternator
80A
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Bosch - Corporate Logo
T#:638838
Part#: AL46X
Special Order: No Guaranteed ETA
$ 189.99 USD
Free Shipping
$ 189.99 USD
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This genuine Bosch OE-remanufactured unit restores optimal 80-amp charging efficiency, guaranteeing your engine management system receives the steady voltage required for crisp throttle response and flawless operation.
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Genuine BMW Outdoor Temperature Sensor / Probe
For vehicles with production date up to 05/1989
Genuine BMW - Corporate Logo
T#:11195
Part#: 65811385337
Ships in 4 Business Days
1% off MSRP $ 178.99

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

$ 177.99 USD
Free Shipping
1% off MSRP
$ 178.99

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

$ 177.99 USD
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Genuine BMW Sensor Outdoor Temperatur
This item fits the following BMW Chassis:
E30 M3,E30



Genuine BMW - Corporate Logo
T#:39298
Part#: 12421711258
Ships in 4 Business Days
2% off MSRP $ 144.99

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

$ 141.99 USD
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2% off MSRP
$ 144.99

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

$ 141.99 USD
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Genuine BMW Battery Cable (Plus Pole) - L=890mm
This item fits the following BMW Chassis:
E30

Fits BMW Engines including:
M20

Hella - Corporate Logo
T#:592708
Part#: 3001651
Ships in 1 Business Day
$ 143.99

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

$ 124.99 USD
Free Shipping on orders $49 and up
$ 124.99 USD
Free Shipping on orders $49 and up
Get noticed with this air horn kit from Hella!
Hamburg Tech - Corporate Logo
T#:46684761
Part#: 12121722570
Ships in 1 Business Day
$ 114.99 USD
Free Shipping on orders $49 and up

Hella - Corporate Logo
T#:591862
Part#: 12141720852
Ships in 1 Business Day
$ 118.99

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

$ 112.99 USD
Free Shipping
$ 112.99 USD
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Having a crank but no starting issue? This sensor is often the culprit

Genuine BMW Battery Cover - E30 318i 318is 325ix 325i 325is 325e ...
For vehicles with production date from 09/1987
Genuine BMW - Corporate Logo
T#:9905
Part#: 51471971556
Ships in 4 Business Days
2% off MSRP $ 113.99

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

$ 111.99 USD
Free Shipping
2% off MSRP
$ 113.99

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

$ 111.99 USD
Free Shipping


Genuine BMW Battery Cover -
This item fits the following BMW Chassis:
E30

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
Ships on Nov 25, 2026
Starting at $ 108.99 USD
Free Shipping
Starting at $ 108.99 USD
Free Shipping
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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Genuine BMW - Corporate Logo
T#:19315
Part#: 12311288238
Ships in 4 Business Days
3% off MSRP $ 109.99

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

$ 106.99 USD
Free Shipping
3% off MSRP
$ 109.99

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

$ 106.99 USD
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Genuine BMW Pulley - D=66mm

This item fits the following BMW Chassis:
E30 M3,E30,E34

Fits BMW Engines including:
M10,M20,S14

TCEuro - Corporate Logo
T#:31622557
Part#: ELE-0031.1
Special Order: No Guaranteed ETA
$ 99.00 USD
Free Shipping on orders $49 and up

Genuine BMW - Corporate Logo
T#:155141
Part#: 65811376047
Ships in 4 Business Days
1% off MSRP $ 94.99

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

$ 93.99 USD
Free Shipping
1% off MSRP
$ 94.99

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

$ 93.99 USD
Free Shipping


Genuine BMW Gong -
This item fits the following BMW Chassis:
E30


Genuine BMW - Corporate Logo
T#:7126
Part#: 12311312137
Ships in 4 Business Days
2% off MSRP $ 92.99

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

$ 90.99 USD
Free Shipping
2% off MSRP
$ 92.99

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

$ 90.99 USD
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Replace the alternator adjuster on BMW's with the M20 engine with this Genuine BMW part. Over time this part can become corroded or the teeth can become stripped.

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:
1984-1985 E30 BMW 318i
1988-1991 E30 BMW M3
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Bosch - Corporate Logo
T#:594976
Part#: 12141721504
Ships in 2 Business Days
$ 88.34 USD
Free Shipping
$ 88.34 USD
Free Shipping
Genuine BMW - Corporate Logo
T#:10454
Part#: 61131368802
In Stock
7% off MSRP $ 87.87

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

$ 81.98 USD
Free Shipping on orders $49 and up
7% off MSRP
$ 87.87

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

$ 81.98 USD
Free Shipping on orders $49 and up
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.
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:
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
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Genuine BMW - Corporate Logo
T#:116589
Part#: 51711953889
Ships in 4 Business Days
$ 80.99 USD
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$ 80.99 USD
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Genuine BMW Battery Tray -
This item fits the following BMW Chassis:
E30

Genuine BMW - Corporate Logo
T#:116426
Part#: 51711922158
Ships in 4 Business Days
$ 80.99 USD
Free Shipping on orders $49 and up
$ 80.99 USD
Free Shipping on orders $49 and up


Genuine BMW Battery Tray -
This item fits the following BMW Chassis:
E30


PIAA - Corporate Logo
T#:31158805
Part#: 85115
Ships on Sep 23, 2026
$ 77.99 USD
Free Shipping on orders $49 and up
Superior Bass Sports Horn Kit 330Hz + 400Hz 112Db

The Superior Bass Sports Horn Kit 330Hz + 400Hz 112Db is designed to make sure your presence is known with powerful, attention-grabbing sound. These high-performance sports horns feature:

  • Impressive Loudness: Delivers a powerful 112 decibels, ensuring you’re heard in any situation.
  • Dual Frequency: Includes 330Hz and 400Hz horns for a dynamic and distinct sound.
  • Lightweight & Durable: Constructed for easy installation with weather-resistant covers, built to withstand the elements.
  • Easy Installation: Quick and straightforward to install, enhancing vehicle safety with minimal effort.

The kit is a must-have for anyone looking to enhance their vehicle’s horn performance and visibility on the road.

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Schwaben Automatic Battery Tender
10X Entries Into Our F80 M3 Sweepstakes
Schwaben - Corporate Logo
T#:378277
Part#: 005979SCH01A
In Stock
Sale - Save 25% $ 100.99

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

$ 75.74 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 100.99

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

$ 75.74 USD
Free Shipping on orders $49 and up
This Schwaben Battery Charger is designed to work on 6 or 12 volt Lead-acid batteries only, includes WET, MF,AGM and GEL types. Do not use on dry cell batteries commonly used in appliances. Charger features, Charging voltage auto select. Selectable Charging current,8 LED indicators, No risk of overcharging, overheating protection, Short circuit protection.
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Genuine BMW - Corporate Logo
T#:10014
Part#: 51711380392
In Stock
$ 73.78 USD
Free Shipping on orders $49 and up


Genuine BMW Trim Panel Wire Harnes Engine
This item fits the following BMW Chassis:
E30 M3,E30


Advanced Auto Fabrication - Corporate Logo
T#:7593105
Part#: 116177
Ships in 3 Business Days
$ 71.99 USD
Free Shipping on orders $49 and up
Since 2010, Advanced Auto Fabrication has been producing and developing both parts and full fledged race cars. Their knowledge base covers a wide range of vehicles both domestic and imported. In the specific case of BMW, the team at AAF has a particular affinity for building and designing components for BMW race cars. AAF's Oil Pressure Sensor Relocation Kit allows for an aftermarket low pressure switch as well as oil pressure sensor, or two 1/8' NPT pressure sensors to be installed. This can allow a gauge or light to be on the dash and still log oil pressure in a data logger. This kit also moves the oil pressure sensor away from the engine and onto the chassis (or any other spot) where is it much easier to access, or install larger size diameter sensors. Fits all M20 Engines. Features: 4AN Stainless Steel Braided Line Banjo Bolt and Fitting (installs onto block) 3 Way 1/8' NPT Tee Fitting, for hose from block and 2 sensors. Note: This kit does not come with sensors – the factory low pressure switch can NOT be used. An aftermarket 1/8″ NPT low pressure switch can be used with the factory wire.
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Genuine BMW - Corporate Logo
T#:14868
Part#: 12631710726
Ships in 4 Business Days
3% off MSRP $ 72.99

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

$ 70.99 USD
Free Shipping on orders $49 and up
3% off MSRP
$ 72.99

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

$ 70.99 USD
Free Shipping on orders $49 and up


Genuine BMW Diode Relay
This item fits the following BMW Chassis:
E30 M3,E30

Fits BMW Engines including:
M20,M30,S14,S38



Genuine BMW - Corporate Logo
T#:10013
Part#: 51711380391
Ships in 3 Business Days
$ 67.19 USD
Free Shipping
$ 67.19 USD
Free Shipping


Genuine BMW Covering Wire Harnes Engine
This item fits the following BMW Chassis:
E30 M3,E30

OMP - Corporate Logo
T#:1614
Part#: EA-462
In Stock
$ 65.00 USD
Free Shipping
$ 65.00 USD
Free Shipping
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.
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Genuine BMW - Corporate Logo
T#:10012
Part#: 51711380390
Ships in 3 Business Days
$ 64.50 USD
Free Shipping on orders $49 and up


Genuine BMW Support Wire Harnes Engine
This item fits the following BMW Chassis:
E30 M3,E30



Bosch - Corporate Logo
T#:19326
Part#: 12311726022
In Stock at Vendor
$ 68.99

This product was last offered at the strikethrough price on
04-09-2026

$ 62.99 USD
Free Shipping on orders $49 and up
$ 62.99 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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Genuine BMW - Corporate Logo
T#:22418
Part#: 12421719664
Ships in 4 Business Days
3% off MSRP $ 64.99

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

$ 62.99 USD
Free Shipping on orders $49 and up
3% off MSRP
$ 64.99

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

$ 62.99 USD
Free Shipping on orders $49 and up


Genuine BMW Battery Cable Negative - L=170mm

This item fits the following BMW Chassis:
E30

Fits BMW Engines including:
M10,M20,M42