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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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Turner Motorsport - Corporate Logo
T#:508
Part#: TEN9989M50
In Stock
Sale - Save 25% $ 89.99

This product was last offered at the strikethrough price on
06-13-2026

$ 67.49 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 89.99

This product was last offered at the strikethrough price on
06-13-2026

$ 67.49 USD
Free Shipping on orders $49 and up
Made in the USA The TMS Water Temp Sensor Wiring Adaptor is needed when you are upgrading to OBD-I (1992-1995 components) on a 3.2 or 2.8 liter engine. These earlier engines use two separate water temp sensors in the head, one for the ECU and one for the instrument cluster. Most of the 3.2 and some of the 2.8 liter engines do not have two holes drilled in the head for the early water temp sensors. This is due to the fact that the 3.2 and 2.8 engines used a combined water temp sensor. So we designed a easy to use plug and play wiring harness. The benefits are: No cutting and splicing, no trying to fine plugs and pins. We also suggest using TMS "3.2 in a 3.0" Coolant Hose Adapter P/N: TEN9931007 to make your life easier.
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Burger Motorsports - Corporate Logo
T#:34885402
Part#: 4BAR TMAP
Back Ordered
$ 139.99 USD
Free Shipping on orders $49 and up
Use these plug and play adapters to quickly adapt a 4bar TMAP sensor to your N54/N55/S55 BMW, raising the boost maximum boost range from 20psi factory up to 43psi.
Bremi - Corporate Logo
T#:34683819
Part#: 12147539165
In Stock
$ 49.99

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

$ 44.99 USD
Free Shipping on orders $49 and up
$ 44.99 USD
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Bremi Camshaft Position Sensor - Intake is an essential component for optimizing your BMW’s engine timing and performance. Manufactured by Bremi and available through Turner Motorsport, this high-quality intake camshaft position sensor precisely monitors the camshaft’s rotation and communicates critical data to the engine control unit. By ensuring accurate timing for the intake valves, this sensor helps maintain optimal fuel efficiency, smooth idling, and reduces emissions. Replacing a faulty camshaft position sensor can prevent common engine issues such as misfires, stalling, or rough idling.

The Bremi Camshaft Position Sensor - Intake meets OEM specifications, providing a reliable, durable solution that’s designed to withstand high temperatures and vibration for long-lasting performance.

Benefits:

Improves Engine Timing: Provides precise timing data for smooth, responsive engine performance Enhances Fuel Efficiency: Optimizes fuel use, saving on fuel costs and reducing environmental impact Reduces Emissions: Helps maintain cleaner combustion and lowers vehicle emissions Prevents Engine Issues: Minimizes risk of misfires, rough idling, and stalling, prolonging engine life Easy to Install: Direct fit for BMW models, making replacement quick and hassle-free Bremi Camshaft Position Sensor - Intake is the perfect choice to maintain your BMW’s high performance and reliability.

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Voltage Regulator
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Valeo - Corporate Logo
T#:594108
Part#: 12317603775
Ships in 2 Business Days
$ 71.22

This product was last offered at the strikethrough price on
05-04-2026

$ 70.45 USD
Free Shipping on orders $49 and up
$ 70.45 USD
Free Shipping on orders $49 and up
Have you noticed inconsistent electrical power in your interior lately? Your voltage regulator is responsible for maintaining a constant voltage out from the alternator.

Valeo Voltage Regulator - Valeo - E53, E60, E63, E64, E70
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Valeo - Corporate Logo
T#:1196078
Part#: 12318510090
Ships in 2 Business Days
$ 91.37 USD
Free Shipping on orders $49 and up
$ 91.37 USD
Free Shipping on orders $49 and up
OEM replacement for you BMW alternator fixing charging issues
Bremi - Corporate Logo
T#:2027109
Part#: 13627639278
Ships in 2 Business Days
$ 45.99

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

$ 40.99 USD
Free Shipping on orders $49 and up
$ 40.99 USD
Free Shipping on orders $49 and up

Bremi - Corporate Logo
T#:27871806
Part#: 13627806782
Ships in 3 Business Days
$ 71.99

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

$ 63.99 USD
Free Shipping on orders $49 and up
$ 63.99 USD
Free Shipping on orders $49 and up
The crankshaft position sensor tells the computer whether the timing is correct in the engine. Symptoms such as no start or extended cranking times can be a telltale sign that you need to replace your crankshaft positioning sensor that is either faulty or damaged.
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Bremi - Corporate Logo
T#:590416
Part#: 12141485845
In Stock
$ 45.98

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

$ 42.04 USD
Free Shipping on orders $49 and up
$ 42.04 USD
Free Shipping on orders $49 and up

Burger Motorsports - Corporate Logo
T#:599636
Part#: TYPEA4BARADAPTER
Ships in 3 Business Days
$ 35.00 USD
Free Shipping on orders $49 and up
Use these plug and play adapters to quickly adapt a 4bar TMAP sensor to your N54/N55/S55 BMW, raising the boost maximum boost range from 20psi factory up to 43psi. For very high boost applications, this 4 BAR adapter can be used which requires Bosch 4 BAR sensor (Part # 281002576). SENSOR NOT INCLUDED, Please see T#587716
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Bremi - Corporate Logo
T#:47644906
Part#: 13627593624
Ships in 3 Business Days
$ 193.99

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

$ 173.99 USD
Free Shipping on orders $49 and up
$ 173.99 USD
Free Shipping on orders $49 and up
Alternator
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Valeo - Corporate Logo
T#:594101
Part#: 12318570672
In Stock at Vendor
$ 1,094.99

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

$ 1,062.99 USD
Free Shipping on orders $49 and up
$ 1,062.99 USD
Free Shipping on orders $49 and up
Replacement Alternator from Valeo
Burger Motorsports - Corporate Logo
T#:599637
Part#: TYPEB4BARADAPTER
Back Ordered
$ 35.00 USD
Free Shipping on orders $49 and up
Use these plug and play adapters to quickly adapt a 4bar TMAP sensor to your N54/N55/S55 BMW, raising the boost maximum boost range from 20psi factory up to 43psi. For very high boost applications, this 4 BAR adapter can be used which requires Bosch 4 BAR sensor (Part # 281002576). SENSOR NOT INCLUDED, Please see T#587716
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Remanufactured Alternator - 170A
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Valeo - Corporate Logo
T#:594098
Part#: 12317802929
Ships on Sep 9, 2026
$ 541.55 USD
Free Shipping on orders $49 and up
Replacement Alternator from Valeo
MINI N14 N18 Alternator - 120 Amp 439617
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Valeo - Corporate Logo
T#:28803228
Part#: 12317619254
Ships on Sep 16, 2026
$ 374.99 USD
Free Shipping on orders $49 and up

MINI N14 N18 Alternator is an essential component for powering the electrical system of your Mini. Engineered to provide reliable performance, this alternator ensures your Mini stays running smoothly. Upgrade your Mini with this genuine alternator for dependable power generation.

  • Powers the electrical system
  • Reliable performance
  • Ensures smooth operation
  • Genuine Mini part
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Alternator
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Valeo - Corporate Logo
T#:594102
Part#: 12311247288
Back Ordered
$ 547.99

This product was last offered at the strikethrough price on
05-08-2026

$ 389.23 USD
Free Shipping on orders $49 and up
$ 389.23 USD
Free Shipping on orders $49 and up
Replacement Alternator from Valeo