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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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URO Engine Crankshaft Position Center - BMW
URO Engine Crankshaft Position Center - BMW
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:52621857
Part#: 12141709616
In Stock
New Item
$ 25.99 USD
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$ 25.99 USD
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The URO Parts 020655 Crankshaft Position Sensor offers a cost-effective alternative to expensive OE components without sacrificing quality or longevity.
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
Free Shipping on orders $49 and up
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$ 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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Knock Sensor
Knock Sensor
Bosch - Corporate Logo
T#:54388475
Part#: 13627636937
In Stock
New Item
$ 29.99 USD
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$ 29.99 USD
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Keep your ignition timing razor-sharp and your engine safe from destructive detonation. This replacement Knock Sensor acts as your engine's first line of defense, constantly listening for pre-ignition "pinging" or knocking.
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URO Camshaft Position Sensor - E90, E70 - M57
URO Camshaft Position Sensor - E90, E70 - M57
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:55821688
Part#: 13627792256
Ships in 1 Business Day
New Item
$ 17.99 USD
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$ 17.99 USD
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This URO sensor is built to withstand the intense heat cycles of the BMW engine bay, offering a dependable, budget-friendly solution to restore peak engine efficiency. Designed as a direct swap for the factory unit
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Intensity Lithium-ION Battery - i34RX - 11.5lbs
Intensity Lithium-ION Battery - i34RX - 11.5lbs
Braille - Corporate Logo
T#:54388454
Part#: I34RX
Ships on Oct 28, 2026
New Item
$ 949.99 USD
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$ 949.99 USD
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Whether you're building a dedicated track weapon or upgrading your street machine for ultimate reliability, unsprung and upper-chassis weight is the enemy of performance. Positioned high up in the engine bay or rear corners, a heavy factory battery negatively impacts your car's center of gravity.
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URO Manifold Air Pressure Sensor - R50, R52, R53
URO Manifold Air Pressure Sensor - R50, R52, R53
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:54388350
Part#: 12140872648
Ships in 1 Business Day
New Item
$ 35.99 USD
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$ 35.99 USD
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This unit serves as an ideal baseline or a crucial component replacement
Morimoto Standalone Can-Bus Wiring Harness - H4 / 9003 - Priced Each
Morimoto Standalone Can-Bus Wiring Harness - H4 / 9003 - Priced Each ...
Morimoto - Corporate Logo
T#:54388428
Part#: H240
Ships in 4 Business Days
New Item
$ 21.99 USD
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$ 21.99 USD
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Remanufactured Alternator
Remanufactured Alternator
Bosch - Corporate Logo
T#:57267768
Part#: 12317616126
Special Order: No Guaranteed ETA
New Item
$ 571.99 USD
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$ 571.99 USD
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Keep your BMW's vital electronics powered and your engine running at peak efficiency with a premium remanufactured alternator from Bosch.
AL41X Remanufactured Alternator
AL41X Remanufactured Alternator
Bosch - Corporate Logo
T#:57231540
Part#: 12311466084
Special Order: No Guaranteed ETA
New Item
$ 286.99 USD
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$ 286.99 USD
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Ensure your BMW or European vehicle maintains uninterrupted power under demanding driving conditions with this premium remanufactured alternator by Bosch.
Starter
Starter
Bosch - Corporate Logo
T#:57267806
Part#: 12418625995
Special Order: No Guaranteed ETA
New Item
$ 463.99 USD
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$ 463.99 USD
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Bosch starter units deliver the high-torque cranking performance required to reliably start modern high-compression BMW engines under all thermal conditions.
Starter Solenoid
Starter Solenoid
Bosch - Corporate Logo
T#:57231530
Part#: 12411427080
Special Order: No Guaranteed ETA
New Item
$ 78.99 USD
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$ 78.99 USD
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When you are at the track or gearing up for a weekend backroad drive, the last thing you need is a sluggish starter holding your BMW back.
Remanufactured Alternator - 12V - 170A
Remanufactured Alternator - 12V - 170A
Bosch - Corporate Logo
T#:57267766
Part#: 12317605478
Special Order: No Guaranteed ETA
New Item
$ 499.99 USD
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$ 499.99 USD
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Maintain peak battery performance and protect your vehicle's complex electrical architecture with a motorsport-tested, factory-grade charging replacement.
Starter - Remanufactured
Starter - Remanufactured
Bosch - Corporate Logo
T#:57267807
Part#: 12418621839
Special Order: No Guaranteed ETA
New Item
$ 342.99 USD
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$ 342.99 USD
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Starter
Starter
Bosch - Corporate Logo
T#:57304035
Part#: SR3295N
Special Order: No Guaranteed ETA
New Item
$ 441.99 USD
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$ 441.99 USD
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This new starter delivers crisp power and rapid engine speed recovery, avoiding the typical voltage drop issues associated with worn original units.
Starter - Remanufactured
Starter - Remanufactured
Bosch - Corporate Logo
T#:57304037
Part#: 12417843530
Special Order: No Guaranteed ETA
New Item
$ 412.99 USD
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$ 412.99 USD
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Ensure your high-performance engine cranks reliably every time with an OE-quality starter motor from Bosch.
Remanufactured Alternator
Remanufactured Alternator
Bosch - Corporate Logo
T#:57267767
Part#: 12317561004
Special Order: No Guaranteed ETA
New Item
$ 695.99 USD
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$ 695.99 USD
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This Bosch remanufactured alternator delivers the rock-solid current required to keep your ignition, fuel management, and chassis electronics operating at peak efficiency under demanding conditions.
Remanufactured Alternator - 12V - 150 A
Remanufactured Alternator - 12V - 150 A
Bosch - Corporate Logo
T#:57267763
Part#: AL0757X
Special Order: No Guaranteed ETA
New Item
$ 430.99 USD
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$ 430.99 USD
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This high-output Bosch remanufactured alternator ensures your ignition system and performance electronics receive clean, steady amperage under high-demand driving conditions.
Remanufactured Starter
Remanufactured Starter
Bosch - Corporate Logo
T#:57376671
Part#: SR71XKT
Back Ordered
New Item
$ 342.99

This product was last offered at the strikethrough price on
08-23-2026

$ 212.99 USD
Free Shipping on orders $49 and up
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$ 212.99 USD
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The Bosch SR71X Remanufactured Starter delivers the precise, high torque cranking performance needed to keep your vehicle starting cleanly on the street or at the track
BMW Alternator 150 Amp - Bosch AL0839X
BMW Alternator 150 Amp - Bosch AL0839X
Bosch - Corporate Logo
T#:57376634
Part#: AL0839XKT
Back Ordered
New Item
$ 476.86

This product was last offered at the strikethrough price on
08-23-2026

$ 422.86 USD
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$ 422.86 USD
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Protect your BMW's electrical performance on the road and track with the Bosch AL0839X remanufactured alternator. Designed to handle high demand electrical loads under spirited driving conditions
Mass Air Flow (MAF) Sensor
Mass Air Flow (MAF) Sensor
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:56977979
Part#: 13627520519
Back Ordered
New Item
$ 77.99 USD
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$ 77.99 USD
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Keep your BMW performing at its peak with this reliable Mass Air Flow sensor replacement from URO Parts.

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