Find Parts That Fit Your Vehicle

Home
Engine Parts
Electrical System

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.

Sub-Categories

Sort By:

BMW E6X / E8X / E9X - N52 Replacement Starter Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:15777314

Part#: SR0492NKT2-KT

In Stock

$ 284.99

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

$ 277.99 USD

Add to Wish List

Qty

$ 277.99 USD

Add to Wish List

Is your car having trouble starting? Does your starter click when you turn the key? Sounds like it's time for a new starter motor! Includes new starter with no core charge, intake gaskets, throttle body gasket and hardware.

Show More Show Less

Valvetronic Camshaft Adjuster replacement kit

10X Entries Into Our F80 M3 Sweepstakes

T#:15677492

Part#: 11127556161-KT

In Stock

$ 179.28 USD

Add to Wish List

Qty

$ 179.28 USD

Add to Wish List

Valv-tronic adjuster unit, Changes the the timing shaft to adjust the valve timing.

Bosch Starter Motor With Hardware

10X Entries Into Our F80 M3 Sweepstakes

T#:56110332

Part#: SR0492NKT4

In Stock

$ 273.99

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

$ 261.99 USD

Add to Wish List

Qty

$ 261.99 USD

Add to Wish List

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.

Show More Show Less

Eccentric Shaft Sensor Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:15677508

Part#: 11127581215-KT

In Stock

Sale - Save 6% $ 235.42

This product was last offered at the strikethrough price on
06-16-2026

$ 221.57 USD

Add to Wish List

Qty

Sale - Save 6%

$ 235.42

This product was last offered at the strikethrough price on
06-16-2026

$ 221.57 USD

Add to Wish List

The eccentric shaft sensor is known to fail and can be a costly repair at the dealer. Often caused by oil getting into the connection for the wiring harness and damaging the sensor and causing a check engine light. With this kit you get the the sensor along with new valve cover and eccentric shaft adjuster gaskets to ensure a complete leak free job.

Show More Show Less

Voltage Regulator

T#:596879

Part#: 12321350052

Back Ordered

$ 41.99

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

$ 39.71 USD

Add to Wish List

Qty

$ 39.71 USD

Add to Wish List

If you are having issues with voltage peaking, lights fading in and out as your driving, or your battery keeps dying despite the car running, It could be the result of a faulty voltage regulator. Voltage regulators control the amount of power coming from the alternator.

Show More Show Less

SEG Automotive Alternator - SEG Automotive 0121.715.118 - 12317560985...

T#:54851991

Part#: 12317560985

Ships in 2 Business Days

$ 1,049.99

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

$ 952.99 USD

Add to Wish List

Qty

$ 952.99 USD

Add to Wish List

MINI Alternator - SEG Automotive 0125.711.078

T#:54851993

Part#: 12317613445

In Stock

$ 564.99

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

$ 563.99 USD

Add to Wish List

Qty

$ 563.99 USD

Add to Wish List

SEG Automotive Alternator - SEG Automotive 0124.525.588 - 12317541694...

T#:54851984

Part#: 12317541694

Ships in 2 Business Days

$ 521.99

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

$ 470.99 USD

Add to Wish List

Qty

$ 470.99 USD

Add to Wish List

SEG Automotive Starter - SEG Automotive 0001.108.460 - 12417610344 - ...

T#:55857741

Part#: 12417610344

Ships in 2 Business Days

$ 368.99

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

$ 337.99 USD

Add to Wish List

Qty

$ 337.99 USD

Add to Wish List

MINI Starter - SEG Automotive 0001.106.026

T#:54851997

Part#: 12411489995

Ships in 2 Business Days

$ 432.99

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

$ 402.99 USD

Add to Wish List

Qty

$ 402.99 USD

Add to Wish List

MINI Alternator - SEG Automotive 0124.325.157

T#:54851988

Part#: 12317550319

Ships in 2 Business Days

$ 473.99

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

$ 431.99 USD

Add to Wish List

Qty

$ 431.99 USD

Add to Wish List

SEG Automotive Alternator - SEG Automotive 0124.515.223 - 12317519618...

T#:54851980

Part#: 12317519618

Ships in 2 Business Days

$ 503.99

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

$ 457.99 USD

Add to Wish List

Qty

$ 457.99 USD

Add to Wish List

SEG Automotive New 150A Alternator - 0124.525.561 - E21, E30, E36, E4...

T#:58965212

Part#: 0124.525.561

Ships on Nov 25, 2026

$ 487.99 USD

Add to Wish List

Qty

$ 487.99 USD

Add to Wish List

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.

Show More Show Less

Starter Motor

T#:59001789

Part#: 12417570487

Ships on Nov 25, 2026

$ 325.99 USD

Add to Wish List

Qty

$ 325.99 USD

Add to Wish List

This SEG Automotive unit is built as a direct replacement for the factory 0.9 kW starter on the R50 Hatch and R52 Convertible.

SEG Automotive New Alternator - 0124.525.523 - E46 325i 325Ci 330Ci, ...

T#:58965213

Part#: 0124.525.523

Ships on Nov 25, 2026

$ 495.99 USD

Add to Wish List

Qty

$ 495.99 USD

Add to Wish List

Your BMW's charging system powers everything from ignition to infotainment, so a weak alternator affects the whole car.

SEG Automotive New 120A Alternator - 0124.515.052 - E46, E39 525i 530...

T#:58965210

Part#: 0124.515.052

Ships on Nov 25, 2026

$ 485.99 USD

Add to Wish List

Qty

$ 485.99 USD

Add to Wish List

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.

SEG Automotive N47 N57 Starter Motor - 0001.148.508 - F3x, F10 5 Seri...

T#:58965209

Part#: 0001.148.508

Ships on Nov 25, 2026

$ 274.99 USD

Add to Wish List

Qty

$ 274.99 USD

Add to Wish List

A healthy starter is what gets your BMW from parked to pulling away without a second thought.

SEG Automotive Starter - 12418589891 - G30 540d xDrive

T#:59001787

Part#: 12418589891

Ships on Nov 25, 2026

$ 276.99 USD

Add to Wish List

Qty

$ 276.99 USD

Add to Wish List

Modern G-chassis BMWs deliver serious performance, and none of it matters if the engine won't start.

SEG Automotive B46 B48 New Starter Motor - 0001.170.202 - F3x 330i 43...

T#:58965208

Part#: 0001.170.202

Ships on Nov 25, 2026

$ 216.99 USD

Add to Wish List

Qty

$ 216.99 USD

Add to Wish List

The smart choice for F-chassis owners who want their car starting on the first try, every time.

Starter Motor

T#:59001784

Part#: 12417616698

Ships on Nov 25, 2026

$ 275.99 USD

Add to Wish List

Qty

$ 275.99 USD

Add to Wish List

On a MINI built for quick, spirited driving, there is no reason to put up with slow or hesitant cranking.

Select Vehicle

Purpose

Category

Electrical System

Brand

View All Brands

Price

Special Offers

Shipping