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BMW 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.

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Bosch Starter Motor With Hardware
Bosch Starter Motor With Hardware
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:56110332
Part#: SR0492NKT4
In Stock
New Item
$ 273.99

This product was last offered at the strikethrough price on
08-14-2026

$ 261.99 USD
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$ 261.99 USD
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At the core is a brand-new Bosch Starter Motor, engineered to withstand extreme operating conditions while delivering immediate cranking speed. This kit includes also the required Genuine BMW Aluminum Mounting Screw Set.
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Crankshaft Pulse Sensor
Crankshaft Pulse Sensor
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:55030835
Part#: 3148100018
In Stock
New Item
$ 15.99 USD
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$ 15.99 USD
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Keep your ultimate driving machine running the way it was engineered to with this reliable replacement.
Crankshaft Position Sensor
Crankshaft Position Sensor
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:55030834
Part#: 3148100013
In Stock
New Item
$ 36.99 USD
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$ 36.99 USD
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This Meyle Crankshaft Position Sensor is the perfect solution for restoring the critical engine speed data your ECU relies on.
BMW Alternator - SEG Automotive 0121.715.118
BMW Alternator - SEG Automotive 0121.715.118
SEG Automotive - Corporate Logo
T#:54851991
Part#: 12317560985
Ships in 1 Business Day
New Item
$ 1,049.99

This product was last offered at the strikethrough price on
07-16-2026

$ 961.99 USD
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$ 961.99 USD
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MINI Alternator - SEG Automotive 0125.711.078
MINI Alternator - SEG Automotive 0125.711.078
SEG Automotive - Corporate Logo
T#:54851993
Part#: 12317613445
Ships in 1 Business Day
New Item
$ 564.99

This product was last offered at the strikethrough price on
07-16-2026

$ 521.99 USD
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$ 521.99 USD
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MINI Alternator - SEG Automotive 0124.325.157
MINI Alternator - SEG Automotive 0124.325.157
SEG Automotive - Corporate Logo
T#:54851988
Part#: 12317550319
Ships in 1 Business Day
New Item
$ 473.99

This product was last offered at the strikethrough price on
07-16-2026

$ 436.99 USD
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$ 436.99 USD
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BMW Alternator - SEG Automotive 0124.515.223
BMW Alternator - SEG Automotive 0124.515.223
SEG Automotive - Corporate Logo
T#:54851980
Part#: 12317519618
Ships in 1 Business Day
New Item
$ 503.99

This product was last offered at the strikethrough price on
07-16-2026

$ 462.99 USD
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$ 462.99 USD
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BMW Alternator - SEG Automotive 0124.525.588
BMW Alternator - SEG Automotive 0124.525.588
SEG Automotive - Corporate Logo
T#:54851984
Part#: 12317541694
Ships in 1 Business Day
New Item
$ 521.99

This product was last offered at the strikethrough price on
07-16-2026

$ 474.99 USD
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$ 474.99 USD
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BMW Starter - SEG Automotive 0001.108.460
BMW Starter - SEG Automotive 0001.108.460
SEG Automotive - Corporate Logo
T#:55857741
Part#: 12417610344
Ships in 1 Business Day
New Item
$ 368.99

This product was last offered at the strikethrough price on
07-16-2026

$ 337.99 USD
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$ 337.99 USD
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MINI Starter - SEG Automotive 0001.106.026
MINI Starter - SEG Automotive 0001.106.026
SEG Automotive - Corporate Logo
T#:54851997
Part#: 12411489995
Ships in 1 Business Day
New Item
$ 432.99

This product was last offered at the strikethrough price on
07-16-2026

$ 406.99 USD
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$ 406.99 USD
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Knock Sensor
Knock Sensor
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:55353615
Part#: 12141716055
Ships on Nov 2, 2026
New Item
$ 28.99 USD
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$ 28.99 USD
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This Meyle replacement knock sensor is the perfect solution for keeping your high-performance engine safe and running at its absolute peak.
Meyle Exhaust Camshaft Position Sensor - BMW S54 S62
Meyle Exhaust Camshaft Position Sensor - BMW S54 S62
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:55497462
Part#: 3148000038
Ships in 9 Business Days
New Item
$ 27.99

This product was last offered at the strikethrough price on
09-14-2026

$ 26.99 USD
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$ 26.99 USD
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Don't let a failing camshaft position sensor rob your vehicle of power or cut your track day short. This Meyle replacement camshaft sensor is built to deliver fast, highly accurate data to the ECU, preventing the performance drops, sluggish throttle response, and rough idling caused by worn-out factory electronics. Engineered to withstand high underhood heat and intense vibrations, it keeps your ignition timing and fuel delivery tightly synced, whether you are daily driving or pushing through high-RPM pulls.
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Starter
Starter
SEG Automotive - Corporate Logo
T#:59001787
Part#: 12418589891
Ships on Nov 3, 2026
New Item
$ 276.99 USD
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$ 276.99 USD
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Modern G-chassis BMWs deliver serious performance, and none of it matters if the engine won't start.
Starter Motor
Starter Motor
SEG Automotive - Corporate Logo
T#:58965209
Part#: 0001.148.508
Ships on Nov 3, 2026
New Item
$ 274.99 USD
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$ 274.99 USD
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A healthy starter is what gets your BMW from parked to pulling away without a second thought.
New Alternator
New Alternator
SEG Automotive - Corporate Logo
T#:58965213
Part#: 0124.525.523
Ships on Nov 3, 2026
New Item
$ 495.99 USD
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$ 495.99 USD
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Your BMW's charging system powers everything from ignition to infotainment, so a weak alternator affects the whole car.
New 150A Alternator
New 150A Alternator
SEG Automotive - Corporate Logo
T#:58965212
Part#: 0124.525.561
Ships on Nov 3, 2026
New Item
$ 487.99 USD
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$ 487.99 USD
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SEG Automotive, the company behind Bosch's starter motor and generator business, builds this brand-new 150-amp alternator with a freewheel pulley that smooths out belt loads for a quieter, longer-lasting accessory drive.
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New 120A Alternator
New 120A Alternator
SEG Automotive - Corporate Logo
T#:58965210
Part#: 0124.515.052
Ships on Nov 3, 2026
New Item
$ 485.99 USD
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$ 485.99 USD
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A strong charging system keeps everything from your ignition to your stereo working at its best, and a failing alternator can undermine all of it.
Starter Motor
Starter Motor
SEG Automotive - Corporate Logo
T#:59001784
Part#: 12417616698
Ships on Nov 3, 2026
New Item
$ 275.99 USD
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$ 275.99 USD
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On a MINI built for quick, spirited driving, there is no reason to put up with slow or hesitant cranking.
New Starter Motor
New Starter Motor
SEG Automotive - Corporate Logo
T#:58965208
Part#: 0001.170.202
Ships on Nov 3, 2026
New Item
$ 216.99 USD
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$ 216.99 USD
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The smart choice for F-chassis owners who want their car starting on the first try, every time.
Starter Motor
Starter Motor
SEG Automotive - Corporate Logo
T#:59001789
Part#: 12417570487
Ships on Nov 3, 2026
New Item
$ 325.99 USD
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$ 325.99 USD
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This SEG Automotive unit is built as a direct replacement for the factory 0.9 kW starter on the R50 Hatch and R52 Convertible.
Alternator
Alternator
SEG Automotive - Corporate Logo
T#:59001785
Part#: 12311711204
Ships on Nov 3, 2026
New Item
$ 726.99 USD
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$ 726.99 USD
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The E24 M635CSi is one of BMW's great grand tourers, and keeping one healthy means a charging system you can count on.
Meyle Crankshaft Pulse Sensor - BMW EXX, FXX
Meyle Crankshaft Pulse Sensor - BMW EXX, FXX
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:52762518
Part#: 314810014
Ships on Nov 2, 2026
New Item
$ 19.99 USD
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$ 19.99 USD
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Revitalize your vehicle’s performance and reliability with the MEYLE Crankshaft Pulse Sensor.
Intake air temperature sensor
Intake air temperature sensor
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:58307544
Part#: 13628519445
Ships in 5 Business Days
New Item
$ 25.99 USD
Free Shipping on orders $49 and up
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$ 25.99 USD
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Meyle Camshaft Position Sensor - BMW i3
Meyle Camshaft Position Sensor - BMW i3
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:52762526
Part#: 3148100005
Ships on Nov 2, 2026
New Item
$ 30.99 USD
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$ 30.99 USD
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The MEYLE Camshaft Position Sensor restores the "timing" of your engine, ensuring your fuel is injected at the perfect millisecond.
MEYLE Crank Position Sensor - BMW E46, E90
MEYLE Crank Position Sensor - BMW E46, E90
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:52621846
Part#: MPS0126
Ships on Nov 2, 2026
New Item
$ 29.99 USD
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$ 29.99 USD
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The Meyle MPS0126 Crankshaft Position Sensor is a robust replacement for aging or failing factory sensors that often trigger P0335 or P0339 trouble codes.
Meyle Crank Position Sensor - E36, E34
Meyle Crank Position Sensor - E36, E34
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:55497425
Part#: 3148998003
Back Ordered
New Item
$ 26.99

This product was last offered at the strikethrough price on
08-26-2026

$ 25.99 USD
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$ 25.99 USD
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Don't let a basic sensor keep your E36 or E34 off the tarmac—swap in this high-quality Meyle unit and drive with confidence.

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