Home
Engine Parts
Electrical System

BMW Electrical Sensors, Switches, & Relays for BMW 3 Series E46 (1999-2005)

Clear BMW chassis

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:

Oil Level Sensor - E46 E39 E60 E38 X3 X5 Z3 Z4 Z8

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:395203

Part#: 12617508003

In Stock

Sale - Save 30% $ 64.99

This product was last offered at the strikethrough price on
11-07-2026

$ 45.49 USD

Add to Wish List

Qty

Sale - Save 30%

$ 64.99

This product was last offered at the strikethrough price on
11-07-2026

$ 45.49 USD

Add to Wish List

This is the oil level sensor / sender for BMW E46 E39 E60 E38 X3 X5 Z3 Z4 Z8.When this part fails it will illuminate a check light on the dash which indicates it needs to be replaced. Includes o-ring. This item fits the following BMWs: 1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330xi M3 2008+ E90 BMW 335d 1999-2003 E39 BMW 528i 525i 530i M5 1998-2003 E39 BMW 540i 2004-2005 E60 BMW 525i 530i 1998-2001 E38 BMW 740i 740il 750il 2004-2006 E85 BMW X3 2.5i X3 3.0i 2000-2006 E53 BMW X5 3.0i 2000-2003 E53 BMW X5 4.4i X5 4.6is 1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i 2001-2002 Z3 BMW Z3 M Roadster Z3 M Coupe 2003-2006 Z4 BMW Z4 2.5i Z4 3.0i 2000-2003 E52 BMW Z8

Show More Show Less

Bremmen Crankshaft Position Sensor - E36 E46 E39 E60 X3 X5 Z3 Z4 ...

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:640146

Part#: 12141709616

Ships on Jan 11, 2027

Sale - Save 30% $ 40.99

This product was last offered at the strikethrough price on
11-07-2026

$ 28.69 USD

Add to Wish List

Qty

Sale - Save 30%

$ 40.99

This product was last offered at the strikethrough price on
11-07-2026

$ 28.69 USD

Add to Wish List

This is the crank shaft position sensor. It provides information for the ECU. A faulty sensor can cause issues with timing adjustment and limit performance and vehicle operation. Replace your sensor with a high-quality Bremmen sensor to restore peak performance.

Show More Show Less

Camshaft Position Sensor - E46 M3, Z4M, Z3M S54

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:36913379

Part#: 12147539171

In Stock

Sale - Save 30% $ 91.99

This product was last offered at the strikethrough price on
11-07-2026

$ 64.39 USD

Add to Wish List

Qty

Sale - Save 30%

$ 91.99

This product was last offered at the strikethrough price on
11-07-2026

$ 64.39 USD

Add to Wish List

The camshaft position sensor is essential for assisting the engine DME by monitoring the camshaft's position. The data from this sensor is key to optimizing ignition timing and ensuring smooth engine performance.

Often referred to as the CMP sensor, this component is crucial for the overall functionality of the powertrain. A failing camshaft position sensor can cause a range of issues, including engine stumbling, hesitation during acceleration, power loss, and even starting difficulties or complete failure to start.

Show More Show Less

Bremmen Camshaft Position Sensor - E46 E39 E60 E83 Z3 Z4

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:640145

Part#: 12147518628

Ships on Dec 16, 2026

Sale - Save 20% $ 32.99

This product was last offered at the strikethrough price on
11-07-2026

$ 26.39 USD

Add to Wish List

Qty

Sale - Save 20%

$ 32.99

This product was last offered at the strikethrough price on
11-07-2026

$ 26.39 USD

Add to Wish List

A bad cam sensor can cause a variety of problems from hard starting to stalling at low speeds. Cam sensor replacement has been known to cure many drivability issues

OMP Battery Cut Off Switch / Kill Switch

T#:1614

Part#: EA-462

Back Ordered

$ 65.00 USD

Add to Wish List

Qty

$ 65.00 USD

Add to Wish List

OMP Battery Cut Off Switch / Kill Switch, for use in racecars as an emergency "kill switch", to depower the electrical system in the event of a crash or other emergency. This cut off switch is FIA approved, has 6 poles and alternator protection, as well as a removable key.

Show More Show Less

Bremmen Parts Outdoor Temperature Sensor / Probe - 65816936953 ...

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:30728992

Part#: 65816936953

In Stock

Sale - Save 30% $ 13.99

This product was last offered at the strikethrough price on
11-07-2026

$ 9.79 USD

Add to Wish List

Qty

Sale - Save 30%

$ 13.99

This product was last offered at the strikethrough price on
11-07-2026

$ 9.79 USD

Add to Wish List

Crankshaft Sensor O-Ring (18 X 1.2 Mm)

T#:13233505

Part#: 12141402705

Ships in 1 Business Day

$ 1.49

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

$ 1.28 USD

Add to Wish List

Qty

$ 1.28 USD

Add to Wish List

This O-Ring can sometimes leak at the bottom of your engine and need to be replaced. Fits around the head of the lower crankshaft sensor and provides a connection point.

Starter Motor

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:55030826

Part#: 12412354693

Ships on Dec 15, 2026

Sale - Save 10% $ 129.99

This product was last offered at the strikethrough price on
11-07-2026

$ 116.99 USD

Add to Wish List

Qty

Sale - Save 10%

$ 129.99

This product was last offered at the strikethrough price on
11-07-2026

$ 116.99 USD

Add to Wish List

Select Vehicle

Purpose

Category

Electrical System

Brand

View All Brands

Price

Special Offers

Shipping