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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Safety Pressure Switch
Safety Pressure Switch
Santech - Corporate Logo
T#:641428
Part#: 64531386971
Ships in 1 Business Day
$ 41.97

This product was last offered at the strikethrough price on
07-03-2026

$ 38.59 USD
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$ 38.59 USD
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Is your air conditioning system faulting by turning on and off at random, leaving you sweating in the hot summer days? The pressure switch shuts off the A/C compressor if the refrigerant pressure is too low or too high to protect your A/C system components from damage. If the switch is faulty, the A/C compressor will shut off at random intervals, or not turn on at all, without cooling the interior cabin. If this is the case with your A/C system, replace your pressure switch to restore cool air.
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Crankshaft Position Sensor
Crankshaft Position Sensor
Facet - Corporate Logo
T#:6366585
Part#: 12141721861
In Stock
$ 64.11

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

$ 57.99 USD
Limited Qty Sale
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$ 64.11

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

$ 57.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Add to Wish List
Facet Crankshaft Position Sensor - E28, E30, E34
Facet Crankshaft Position Sensor - E28, E30, E34
For vehicles with a production date from 09/1987
Facet - Corporate Logo
T#:554187
Part#: 12141720856
Ships in 1 Business Day
$ 45.99 USD
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$ 45.99 USD
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Having a crank but no starting issue? This sensor is often the culprit
SKF Alternator Ball Bearing 47X17X14 - Multiple BMWs
SKF Alternator Ball Bearing 47X17X14 - Multiple BMWs
SKF - Corporate Logo
T#:2602208
Part#: 12311722979
Ships in 10 Business Days
$ 29.99 USD
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$ 29.99 USD
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SKF Grooved Ball Bearing - 47X17X14 This item fits the following BMW Chassis: E30 M3,E34 M5,E30,E34,E36 Fits BMW Engines including: M10,M20,M30,M42,S14,S38
Ambient (Outside) Temperature Sensor
Ambient (Outside) Temperature Sensor
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:376060
Part#: 65811383204
In Stock
$ 32.99 USD
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$ 32.99 USD
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If your old, original sensor has failed, you will not get a correct temperature reading. Replace it and restore function to your BMW.
OEM Schaeffler Alternator Bearing - BMW E21 E30 E36 E12 E28 E34 E23 E32
OEM Schaeffler Alternator Bearing - BMW E21 E30 E36 E12 E28 E34 E23 E...
Schaeffler - Corporate Logo
T#:41965072
Part#: 6201-Z
Ships in 7 Business Days
$ 32.99 USD
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$ 32.99 USD
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Offered by OEM Schaeffler, this bearing replaces BMW part number 12311739203, which is found in numerous BMW alternators manufactured prior to 1996. This bearing helps to stabilize the shaft of the alternator, allowing it to spin freely. If you are experiencing a loud squeaking or grinding noise from your alternator, there is a good chance one of the internal bearings has failed and needs to be replaced.
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Facet Crankshaft Position Sensor - E28, E30, E34
Facet Crankshaft Position Sensor - E28, E30, E34
Facet - Corporate Logo
T#:402192
Part#: 12141720852
Ships in 4 Business Days
$ 48.99 USD
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$ 48.99 USD
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Having a crank but no starting issue? This sensor is often the culprit
Crankshaft Position Sensor - E30 325e 325i 325is E34 525i
Crankshaft Position Sensor - E30 325e 325i 325is E34 525i
Packaged by Turner - Corporate Logo
T#:338003
Part#: 12141720852
Ships on Oct 19, 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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Electrical Connector - Priced Each
Electrical Connector - Priced Each
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:367145
Part#: 61132359999
Ships in 1 Business Day
$ 18.99 USD
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$ 18.99 USD
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2 pin used in many locations on late model BMWs
URO Coolant Level Sensor - E24 E30 E32 E34
URO Coolant Level Sensor - E24 E30 E32 E34
For vehicles with production date from 09/1986
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:593414
Part#: 61311378320
Ships in 1 Business Day
$ 17.99 USD
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$ 17.99 USD
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This sensor is critical in keeping tabs of your cooling system's health.
Alternator Bracket Bushing - Priced Each
Alternator Bracket Bushing - Priced Each
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:592985
Part#: 12311715491
Ships in 1 Business Day
$ 2.99 USD
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$ 2.99 USD
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Rubber bushing, placed in the top portion of the alternator support bracket. Each vehicle requires two.
Flasher/Hazard Light Relay
Flasher/Hazard Light Relay
Wehrle - Corporate Logo
T#:31522987
Part#: 61311371909
Ships in 1 Business Day
$ 20.37

This product was last offered at the strikethrough price on
07-15-2026

$ 18.57 USD
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$ 18.57 USD
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Temperature Sensor
Temperature Sensor
For vehicles with production date from 09/1985
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Meyle - Corporate Logo
T#:637028
Part#: 12621710511
Ships on Dec 1, 2026
$ 15.99 USD
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$ 15.99 USD
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Oil Temperature Sensor And Gauge Kit - Blue & Red - Multiple BMWs
Oil Temperature Sensor And Gauge Kit - Blue & Red - Multiple BMWs ...
Packaged by Turner - Corporate Logo
T#:401689
Part#: OILTEMPGAUGEBRKK
Ships on Dec 1, 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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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 - Green & White - Multiple BMWs
Oil Temperature Sensor And Gauge Kit - Green & White - Multiple BMWs ...
Packaged by Turner - Corporate Logo
T#:401690
Part#: OILTEMPGAUGEKT1
Ships on Dec 1, 2026
Sale - Save 2% $ 196.99

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

$ 193.26 USD
Free Shipping
Add to Wish List
Sale - Save 2%
$ 196.99

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

$ 193.26 USD
Free Shipping
Add to Wish List
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 Pressure Switch
Oil Pressure Switch
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:373035
Part#: 61311354274
Back Ordered
$ 3.99 USD
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$ 3.99 USD
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Make sure your vehicle is reading its oil pressure correctly with a new oil pressure switch.
Oil Pressure Switch
Oil Pressure Switch
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:591879
Part#: 12611277642
Back Ordered
$ 1.99 USD
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$ 1.99 USD
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Your vehicle is equipped with numerous gauges to allow you to have a better idea of what is going on under the hood. By monitoring these gauges, you can prevent premature engine damage due to low oil pressure or high coolant temperatures. If one isn't functional though, you are in the dark as far as that system goes. One of the most vital is the oil pressure. Replace the sensor to get your gauge working properly again.
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