Find Parts That Fit Your Vehicle

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:
OBDI Conversion Part - Water Temp Sensor Wiring Adaptor
OBDI Conversion Part - Water Temp Sensor Wiring Adaptor
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
Add to Wish List
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
Add to Wish List
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.
Show More Show Less
Rein Alternator Mounting Screw Set
Rein Alternator Mounting Screw Set
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:14795
Part#: 12310392568
In Stock
$ 20.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 20.99 USD
Free Shipping on orders $49 and up
Add to Wish List


BMW Set Of Alu. Screws Generator -
This item fits the following BMW Chassis:
E70 X5,E82,E83 X3,E85,E86,E89 Z4,E90,E92,E93,F10,F25 X3

Fits BMW Engines including:
N51,N52,N52N

Show More Show Less
AAF Oil Pressure Sensor Relocate Kit - M20
AAF Oil Pressure Sensor Relocate Kit - M20
Advanced Auto Fabrication - Corporate Logo
T#:7593105
Part#: 116177
Ships in 3 Business Days
$ 71.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 71.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Since 2010, Advanced Auto Fabrication has been producing and developing both parts and full fledged race cars. Their knowledge base covers a wide range of vehicles both domestic and imported. In the specific case of BMW, the team at AAF has a particular affinity for building and designing components for BMW race cars. AAF's Oil Pressure Sensor Relocation Kit allows for an aftermarket low pressure switch as well as oil pressure sensor, or two 1/8' NPT pressure sensors to be installed. This can allow a gauge or light to be on the dash and still log oil pressure in a data logger. This kit also moves the oil pressure sensor away from the engine and onto the chassis (or any other spot) where is it much easier to access, or install larger size diameter sensors. Fits all M20 Engines. Features: 4AN Stainless Steel Braided Line Banjo Bolt and Fitting (installs onto block) 3 Way 1/8' NPT Tee Fitting, for hose from block and 2 sensors. Note: This kit does not come with sensors – the factory low pressure switch can NOT be used. An aftermarket 1/8″ NPT low pressure switch can be used with the factory wire.
Show More Show Less
AAF Jump Post Relocation Bracket - E46
AAF Jump Post Relocation Bracket - E46
Advanced Auto Fabrication - Corporate Logo
T#:7608844
Part#: 11648
In Stock at Vendor
$ 28.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 28.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Since 2010, Advanced Auto Fabrication has been producing and developing both parts and full fledged race cars. Their knowledge base covers a wide range of vehicles both domestic and imported. In the specific case of BMW, the team at AAF has a particular affinity for building and designing components for BMW race cars. The AAF E46 Jump Post Relocation Bracket makes it easy to adjust camber/caster on your race car by getting the factory jump post out of the way! In race car applications, the desired camber and caster settings can cause the strut tops and shock adjusters to interfere with the factory jump post. This kit takes just a few minutes to install and makes using strut braces and adjusting camber plates just that much safer and faster.
Show More Show Less
Voltage Regulator
Voltage Regulator
Beru - Corporate Logo
T#:596879
Part#: 12321350052
In Stock at Vendor
$ 41.99

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

$ 40.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 40.99 USD
Free Shipping on orders $49 and up
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
Oil Pressure Switch (fits most BMWs)
Oil Pressure Switch (fits most BMWs)
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:363
Part#: 12617568480
In Stock
$ 11.99

This product was last offered at the strikethrough price on
04-21-2026

$ 7.39 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 7.39 USD
Free Shipping on orders $49 and up
Add to Wish List
Having your oil pressure light come on can mean very serious problems. Or it could just be this switch that fails several times over a car's lifespan. By no means should you ignore the warning light but replacing this sensor could be the actual culprit. The other problem with this switch is that oil can leak past its seal. With the oil under a lot of pressure at this point, the oil loss can be a serious concern. It's a simple replacement when doing most oil change work.

This Oil Pressure Switch fits the following BMWs:
1985-1991 E30 318i, 318is, 325e, 325i, M3
1992-1999 E36 318i/is, 325i/is, 328i/is, 323is, M3
1992-1997 E31 840i, 850i
1988-1994 E32 735i, 735iL, 740i, 740iL
1989-1995 E34 525i, 530i, 535i, 540i, M5
1995-2001 E38 740i, 740iL, 750i, 750iL
1996-2002 Z3 Roadster/Coupe 1.9, 2.3, 2.5, 2.8, 3.0, 3.2
1997-2003 E39 525i, 528i, 530i, 540i, M5
1999-2005 E46 323, 325, 328, 330, M3
2000-2003 Z8 roadster
2001-2006 E53 X5 X5 3.0i, X5 4.4i, X5 4.6is, X5 4.8is
2002+ E65/E66 745i, 745li, 750i, 750li, 760i, B7 Alpina
2003+ Z4 Roadster/Coupe Z4 2.5, 3.0, 3.0si
2004+ E60 525i, 530i, 535i, 545i, 550i, M5
2005+ E63/E64 645Ci, 650i, M6
2005+ E83 X3 X3 2.5, X3 3.0
2006+ E90/E92 325, 328, 330, 335
2007+ E70 X5 X5 3.0i, X5 4.8i
Show More Show Less
Rein Relay
Rein Relay
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:381382
Part#: 61311378297
Ships in 3 Business Days
$ 20.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 20.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Replacement relay for the typical white-green and orange relays found in your vehicle
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 on Sep 1, 2026
New Item
$ 21.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 21.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Starter Mounting Hardware
Starter Mounting Hardware
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:594380
Part#: 12410392577
Ships in 1 Business Day
$ 10.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 10.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Modern starter and water pump fasteners are torque-to-yield, meaning they stretch and can only be safely used once. Replace your hardware for peace of mind.

Select Vehicle

BMW Mini
Clear Vehicle

Purpose

Category

Brand

Price

$
$

Special Offers

Shipping