BMW Electrical Sensors, Switches, & Relays for BMW 5 Series E34 (1987-1995)

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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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OMP Battery Cut Off Switch / Kill Switch

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:1614

Part#: EA-462

Back Ordered

$ 65.00 USD

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$ 65.00 USD

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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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Crankshaft Position Sensor - E30 325e 325i 325is E34 525i

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:338003

Part#: 12141720852

Ships on Sep 30, 2026

Starting at $ 108.99 USD

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Starting at $ 108.99 USD

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This crank shaft position sensor (CPS) provides the engine computer with engine speed data via the harmonic balancer. It mounts off the engine block and reads the front crank pulley to tell the engine what position the engine internals are in. This sensor is crucial for starting the car as the ECU will not allow the engine to start without this signal. It fits all M20 engines in the E30 and E34. A lot of times the sensor is covered in oil, broken from a spinning belt, or the clearance to the pulley is not correct (should be .040"). Interchangeable with #12141720856.

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

This item fits the following BMWs:
1987-1991 E30 BMW 325e 325es 325i 325is 325ix 325ic
1989-1990 E34 BMW 525i

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Morimoto Standalone Can-Bus Wiring Harness - H4 / 9003 - Priced Each ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:54388428

Part#: H240

Ships on Jul 21, 2026

Sale - Save 17% $ 21.99

This product was last offered at the strikethrough price on
06-23-2026

$ 18.21 USD

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Sale - Save 17%

$ 21.99

This product was last offered at the strikethrough price on
06-23-2026

$ 18.21 USD

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Oil Temperature Sensor And Gauge Kit - Green & White - Multiple BMWs ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:401690

Part#: OILTEMPGAUGEKT1

Ships on Nov 11, 2026

Sale - Save 2% $ 196.99

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

$ 193.26 USD

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Qty

Sale - Save 2%

$ 196.99

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

$ 193.26 USD

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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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Oil Temperature Sensor And Gauge Kit - Blue & Red - Multiple BMWs ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:401689

Part#: OILTEMPGAUGEBRKK

Ships on Nov 11, 2026

Sale - Save 2% $ 196.99

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

$ 193.26 USD

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Qty

Sale - Save 2%

$ 196.99

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

$ 193.26 USD

Add to Wish List

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Accessory Drive Belt Kit - E34, E83

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:42167237

Part#: FB0198K

Back Ordered

$ 166.99 USD

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$ 166.99 USD

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Ideal for scheduled maintenance or as a preventive repair, the Accessory Drive Belt Kit offers dependable performance and peace of mind for BMW owners looking to maintain factory-quality operation and longevity

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BMW Electrical Sensors, Switches, & Relays for BMW 5 Series E34 (1987-1995)

Sub-Categories

OMP Battery Cut Off Switch / Kill Switch

Crankshaft Position Sensor - E30 325e 325i 325is E34 525i

Morimoto Standalone Can-Bus Wiring Harness - H4 / 9003 - Priced Each ...

Oil Temperature Sensor And Gauge Kit - Green & White - Multiple BMWs ...

Oil Temperature Sensor And Gauge Kit - Blue & Red - Multiple BMWs ...

Accessory Drive Belt Kit - E34, E83

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