BMW Electrical Sensors, Switches, & Relays for BMW E90 M3 S65 4.0L

Clear BMW chassis

Please ensure your correct model is selected

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:
Turner E9x Cowl Delete Kit
Turner E9x Cowl Delete Kit
10X Entries Into Our F80 M3 Sweepstakes
Turner Motorsport - Corporate Logo
T#:1809115
Part#: 007629LA09KT
In Stock
Sale - Save 25% $ 420.95

This product was last offered at the strikethrough price on
06-14-2026

$ 315.71 USD
Free Shipping
Add to Wish List
Sale - Save 25%
$ 420.95

This product was last offered at the strikethrough price on
06-14-2026

$ 315.71 USD
Free Shipping
Add to Wish List
Get rid of all your plastic in your engine bay for a cleaner look! Completely eliminates the bulky, obtrusive cabin filter housing for more room underhood - offering more room to access the engine. Compliment your engine bay and hide away the exposed ECU.
Show More Show Less
Turner ECU/ Brake Master Cover Set - E9x
Turner ECU/ Brake Master Cover Set - E9x
10X Entries Into Our F80 M3 Sweepstakes
Turner Motorsport - Corporate Logo
T#:1809112
Part#: 007629LA03
In Stock
Sale - Save 25% $ 178.99

This product was last offered at the strikethrough price on
06-14-2026

$ 134.24 USD
Free Shipping
Add to Wish List
Sale - Save 25%
$ 178.99

This product was last offered at the strikethrough price on
06-14-2026

$ 134.24 USD
Free Shipping
Add to Wish List
Our ECU Cover incorporates beauty with OE function. Designed in-house by our industry leading engineering staff, the E9x Turner ECU Cover incorporates beauty with OE function. Made from a heat resistant, textured matte black polymer material, this cover is sure to be turning heads! This cover gives your engine bay the look it should have came with from the factory and hides away the exposed ECU while helping protect it from the elements. We provide a simple cover that installs directly on top of the ECU bracket for an OEM plus look! Installation is a breeze, simply remove screws from the ECU bracket on either side, line up the ECU cover, and hand tighten the screws back on. Add a flash of style and elegance under your hood with our ECU Cover!
Show More Show Less
Turner Cowl Delete Harness Mounting Bracket - E9x
Turner Cowl Delete Harness Mounting Bracket - E9x
10X Entries Into Our F80 M3 Sweepstakes
Turner Motorsport - Corporate Logo
T#:1809114
Part#: 007629LA02
In Stock
Sale - Save 25% $ 143.99

This product was last offered at the strikethrough price on
06-14-2026

$ 107.99 USD
Free Shipping
Add to Wish List
Sale - Save 25%
$ 143.99

This product was last offered at the strikethrough price on
06-14-2026

$ 107.99 USD
Free Shipping
Add to Wish List
Turner E9x Cowl Delete Harness Mounting Bracket mounts to factory bolt holes; it is an easy no-drill install that creates a solid location to tie back your engine harness. However, removing the cowl introduces the possibility of dirt and debris entering your cabin. To solve this issue we suggest pairing it with Burger's Cabin/Cowl Delete Filters. These are small, dry, and maintenance-free filters that both add a finished look to your engine bay and prevent debris from entering the cabin.
Show More Show Less
Turner ECU/ Brake Master Cover Set - E9x
Turner ECU/ Brake Master Cover Set - E9x
10X Entries Into Our F80 M3 Sweepstakes
Turner Motorsport - Corporate Logo
T#:3136218
Part#: 007629LA10KT
In Stock
Sale - Save 25% $ 182.97

This product was last offered at the strikethrough price on
06-14-2026

$ 137.23 USD
Free Shipping
Add to Wish List
Sale - Save 25%
$ 182.97

This product was last offered at the strikethrough price on
06-14-2026

$ 137.23 USD
Free Shipping
Add to Wish List
Our ECU Cover incorporates beauty with OE function. Designed in-house by our industry leading engineering staff, the E9x Turner ECU Cover incorporates beauty with OE function. Made from a heat resistant, textured matte black polymer material, this cover is sure to be turning heads! This cover gives your engine bay the look it should have came with from the factory and hides away the exposed ECU while helping protect it from the elements. We provide a simple cover that installs directly on top of the ECU bracket for an OEM plus look! Installation is a breeze, simply remove screws from the ECU bracket on either side, line up the ECU cover, and hand tighten the screws back on. Add a flash of style and elegance under your hood with our ECU Cover!
Show More Show Less
Schwaben Automatic Battery Tender
Schwaben Automatic Battery Tender
10X Entries Into Our F80 M3 Sweepstakes
Schwaben - Corporate Logo
T#:378277
Part#: 005979SCH01A
In Stock
Sale - Save 25% $ 100.99

This product was last offered at the strikethrough price on
05-02-2026

$ 75.74 USD
Free Shipping on orders $49 and up
Add to Wish List
Sale - Save 25%
$ 100.99

This product was last offered at the strikethrough price on
05-02-2026

$ 75.74 USD
Free Shipping on orders $49 and up
Add to Wish List
This Schwaben Battery Charger is designed to work on 6 or 12 volt Lead-acid batteries only, includes WET, MF,AGM and GEL types. Do not use on dry cell batteries commonly used in appliances. Charger features, Charging voltage auto select. Selectable Charging current,8 LED indicators, No risk of overcharging, overheating protection, Short circuit protection.
Show More Show Less
OMP Battery Cut Off Switch / Kill Switch
OMP Battery Cut Off Switch / Kill Switch
OMP - Corporate Logo
T#:1614
Part#: EA-462
Back Ordered
$ 65.00 USD
Free Shipping
Add to Wish List
$ 65.00 USD
Free Shipping
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
Hella Hella Horn - Low Tone
Hella Hella Horn - Low Tone
Hella - Corporate Logo
T#:590880
Part#: 2768082
In Stock
$ 36.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 36.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Disc Type Low-Tone, 12 V, 335 Hz with Bracket
Hella Hella Horn - High Tone
Hella Hella Horn - High Tone
Hella - Corporate Logo
T#:592707
Part#: 2768551
In Stock
$ 30.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 30.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Disc Type High-Tone, 12 V, 400 Hz with Bracket
Precision Raceworks Ethanol Sensor Breakout Harness
Precision Raceworks Ethanol Sensor Breakout Harness
Precision Raceworks - Corporate Logo
T#:35559424
Part#: 201-0411
In Stock
$ 34.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 34.99 USD
Free Shipping on orders $49 and up
Add to Wish List
n Ethanol Sensor Breakout Harness provides a clean wiring solution by splitting the signal from your ethanol content sensor between two analyzers, such as an ECU/controller and a gauge or Bluetooth display, without modifying your existing harness.his setup enables real-time ethanol level monitoring and facilitates comprehensive DME/ECU adjustments for enhanced automotive performance.citeturn0search0
Show More Show Less
Hella Air Horn Kit
Hella Air Horn Kit
Hella - Corporate Logo
T#:592708
Part#: 3001651
Ships in 2 Business Days
$ 143.99

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

$ 124.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 124.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Get noticed with this air horn kit from Hella!
OEM Hella Crankshaft Position Sensor - Multiple BMWs
OEM Hella Crankshaft Position Sensor - Multiple BMWs
Hella - Corporate Logo
T#:2084
Part#: 13627839138
Special Order: No Guaranteed ETA
$ 99.99 USD
Free Shipping
Add to Wish List
$ 99.99 USD
Free Shipping
Add to Wish List
This crank shaft position sensor provides the ECU with the engine speed signal. OEM Hella sensors are a perfect replacement for faulty position sensors causing poor engine operation. It is mounted in the bell housing at about the 7 o'clock postion of the transmission on most cars. This sensor fits BMW E90 E92 E93 M3, E39 540i M5, E60 M5, E63 M6, E38 740i 740il 750il 1997-2001, E31 840ci 850ci, E52 Z8.
Show More Show Less
Schwaben Self-Adjusting Wire Stripper/Cutter/Crimper
Schwaben Self-Adjusting Wire Stripper/Cutter/Crimper
10X Entries Into Our F80 M3 Sweepstakes
Schwaben - Corporate Logo
T#:37622217
Part#: 3774SCH01A
In Stock
Sale - Save 15% $ 22.99

This product was last offered at the strikethrough price on
05-03-2026

$ 19.54 USD
Free Shipping on orders $49 and up
Add to Wish List
Sale - Save 15%
$ 22.99

This product was last offered at the strikethrough price on
05-03-2026

$ 19.54 USD
Free Shipping on orders $49 and up
Add to Wish List

Schwaben's Self-Adjusting Wire Strippers are an essential addition to any garage or toolbox. Engineered with precision and versatility, these wire strippers automatically adapt to various wire sizes, making them perfect for a wide range of automotive and electrical applications.

Crafted with Schwaben's renowned quality standards, this tool ensures reliable performance and long-lasting durability, helping you tackle wiring tasks efficiently and accurately. Whether you're a professional mechanic or a DIY enthusiast, these wire strippers are your go-to solution for seamless and precise wiring repairs.

Key Features:

Ergonomic Design: 6-inch handles with rubber grips provide superior comfort and control during use. Self-Adjusting Stripper Jaws: Serrated jaws offer a secure grip for consistent and accurate stripping. Adjustable Depth Gauge: Enables precise, repeatable wire stripping to match your project’s needs. Wide Range Compatibility: Strips wires ranging from 10 to 24 AWG with ease. Integrated Wire Cutter: Effortlessly slices wires between 10 and 24 AWG. Built-In Crimper: Crimps both insulated and non-insulated wires in sizes from 10 to 22 AWG. Schwaben’s Self-Adjusting Wire Strippers combine precision, convenience, and durability into one must-have tool, ensuring professional results for every project.

Show More Show Less
Hella Relay
Hella Relay
Hella - Corporate Logo
T#:592718
Part#: 965400001
In Stock
$ 14.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 14.99 USD
Free Shipping on orders $49 and up
Add to Wish List
12V 30A SPST relay with bracket
Hella Horn - Low-Tone
Hella Horn - Low-Tone
Hella - Corporate Logo
T#:28869559
Part#: 7424001
Ships in 6 Business Days
$ 17.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 17.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Universal fit. Not direct fit.
Hella Horn - High-Tone
Hella Horn - High-Tone
Hella - Corporate Logo
T#:592716
Part#: 7424011
Ships in 2 Business Days
$ 17.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 17.99 USD
Free Shipping on orders $49 and up
Add to Wish List

Upgrade the sound of your BMW or MINI with the Hella Horn - High-Tone. This high-quality horn delivers a powerful and attention-grabbing sound, enhancing safety on the road. Designed for easy installation, it provides a quick and effective way to improve the audible presence of your vehicle.

  • Powerful and attention-grabbing sound
  • Enhances safety on the road
  • Easy installation for convenience
  • Compatible with BMW and MINI models
  • High-quality construction for durability

Enhance the audible presence of your BMW or MINI with the Hella Horn - High-Tone, ensuring you're heard when it matters most.

Show More Show Less
Battery Tender Plus Advanced Battery Charging System
Battery Tender Plus Advanced Battery Charging System
Battery Tender - Corporate Logo
T#:49892371
Part#: BTT0210128
In Stock at Vendor
$ 69.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 69.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Hitachi Engine Crankshaft Position Sensor - BMW N52 N54 S85 S65 S63
Hitachi Engine Crankshaft Position Sensor - BMW N52 N54 S85 S65 S63 ...
Hitachi - Corporate Logo
T#:48815471
Part#: 13627525015
Ships in 7 Business Days
$ 66.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 66.99 USD
Free Shipping on orders $49 and up
Add to Wish List
The crankshaft position sensor transmits the crankshaft's position to the computer. This helps the computer to calculate proper spark and fuel control. If you're struggling with CELs, hard starts or no starts, stalling, and/or a rough idle, you may need to replace the crank position sensor.
Show More Show Less
Wire With Terminals For 90 Degree 6 Pin Bulkhead (Red)
Wire With Terminals For 90 Degree 6 Pin Bulkhead (Red)
Precision Raceworks - Corporate Logo
T#:38161695
Part#: 201-0360-RED
Ships in 10 Business Days
$ 5.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 5.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Red in color and 12 Gauge.
Wire With Terminals For 90 Degree 6 Pin Bulkhead - Yellow
Wire With Terminals For 90 Degree 6 Pin Bulkhead - Yellow
Precision Raceworks - Corporate Logo
T#:38161692
Part#: 201-0360-YEL
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Yellow in color and 12 Gauge.
Wire With Terminals For 90 Degree 6 Pin Bulkhead (White)
Wire With Terminals For 90 Degree 6 Pin Bulkhead (White)
Precision Raceworks - Corporate Logo
T#:38161693
Part#: 201-0360-WHT
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. White in color and 12 Gauge.
Wire With Terminals For 90 Degree 6 Pin Bulkhead (Black) 12 Gauge
Wire With Terminals For 90 Degree 6 Pin Bulkhead (Black) 12 Gauge ...
Precision Raceworks - Corporate Logo
T#:38161711
Part#: 201-0360-BLK
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Black in color and 12 Gauge.
Wire With Terminals For 90 Degree 6 Pin Bulkhead (Green)
Wire With Terminals For 90 Degree 6 Pin Bulkhead (Green)
Precision Raceworks - Corporate Logo
T#:38161687
Part#: 201-0361-GRN
Ships in 10 Business Days
$ 3.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 3.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Green in color and 18 Gauge.
Wire With Terminals For 90 Degree 6 Pin Bulkhead - Blue
Wire With Terminals For 90 Degree 6 Pin Bulkhead - Blue
Precision Raceworks - Corporate Logo
T#:38161703
Part#: 201-0360-BLU
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Blue in color and 12 Gauge.
Wire With Terminals For 90 Degree 6 Pin Bulkhead - Black - Dual 18 Gauge
Wire With Terminals For 90 Degree 6 Pin Bulkhead - Black - Dual 18 Ga...
Precision Raceworks - Corporate Logo
T#:38161710
Part#: 201-0362
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Black in color and 18 Gauge dual wire.
Wire With Terminals For 90 Degree 6 Pin Bulkhead - Orange
Wire With Terminals For 90 Degree 6 Pin Bulkhead - Orange
Precision Raceworks - Corporate Logo
T#:38161698
Part#: 201-0360-ORG
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 4.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Orange in color and 12 Gauge.

Select Vehicle

BMW Mini
Clear Vehicle

Purpose

Category

Brand

Price

$
$

Special Offers

Shipping