BMW Electrical Sensors, Switches, & Relays for BMW Z3 (1996-2002)

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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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Braille Performance Lightweight AGM Battery - B14115 - 11.5lbs
Braille Performance Lightweight AGM Battery - B14115 - 11.5lbs ...
Braille - Corporate Logo
T#:558037
Part#: B14115
Ships in 6 Business Days
$ 204.99 USD
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$ 204.99 USD
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When building a car for the track, one of the most important factors to consider is weight. Stock batteries can weigh up to almost 50 pounds and are unnecessarily large, designed to power a host of systems not normally used in a track car (radios, lighting, etc.). What can you do to cut weight the weight without affecting your cars operation? This is where Braille Battery comes in with their long line of performance lightweight battery options! Designed to provide the highest cranking power possible while being up to 75% lighter, Braille Battery is one of the foremost leaders in automotive racing batteries with nothing but high quality, high output batteries in mind!
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Meyle Crankshaft Position Sensor - E36, E39, E46, E53, E60, E83, Z3, Z4
Meyle Crankshaft Position Sensor - E36, E39, E46, E53, E60, E83, Z3, ...
5X Entries Into Our F80 M3 Sweepstakes
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Meyle - Corporate Logo
T#:369703
Part#: 12141709616
In Stock
$ 46.99 USD
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$ 46.99 USD
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Does not include O-ring
Braille Performance Lightweight Advanced AGM Battery - B2015 - 15lbs
Braille Performance Lightweight Advanced AGM Battery - B2015 - 15lbs ...
Braille - Corporate Logo
T#:558038
Part#: B2015
Ships in 9 Business Days
$ 237.99 USD
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$ 237.99 USD
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When building a car for the track, one of the most important factors to consider is weight. Stock batteries can weigh up to almost 50 pounds and are unnecessarily large, designed to power a host of systems not normally used in a track car (radios, lighting, etc.). What can you do to cut weight the weight without affecting your cars operation? This is where Braille Battery comes in with their long line of performance lightweight battery options! Designed to provide the highest cranking power possible while being up to 75% lighter, Braille Battery is one of the foremost leaders in automotive racing batteries with nothing but high quality, high output batteries in mind! The B2015 is Braille's most popular non-carbon racing battery and is able to start larger engines easily for racing and offers daily driving capability for most 4 and 6 cylinders engine vehicles. Physical Specifications: BCI Group: All sizes Weight: 15lbs / 6.8kg Length: 6.8" / 173mm Width: 3.4" / 86mm Height: 6.1" / 155mm Polarity: Right Side Positive Performance Specifications: Voltage: 12 Full Charge Voltage: 13.2 Pulse Cranking Amps (PCA): 1067 Amp Hour (AH): 21 Life Cycle @ 10% DOD: 3100 *THIS BATTERY REQUIRES A CUSTOM MOUNTING SOLUTION. The size and weight are significantly smaller than a stock battery and will not be held in place by the stock battery mount*
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Braille Lightweight Advanced AGM Battery - B3121 - 21lbs
Braille Lightweight Advanced AGM Battery - B3121 - 21lbs
Braille - Corporate Logo
T#:558042
Part#: B3121
Ships in 7 Business Days
$ 270.99 USD
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$ 270.99 USD
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When building a car for the track, one of the most important factors to consider is weight. Stock batteries can weigh up to almost 50 pounds and are unnecessarily large, designed to power a host of systems not normally used in a track car (radios, lighting, etc.). What can you do to cut weight the weight without affecting your car's operation? This is where Braille Battery comes in with their long line of performance lightweight battery options! Designed to provide the highest cranking power possible while being up to 75% lighter, Braille Battery is one of the foremost leaders in automotive racing batteries with nothing but high quality, high output batteries in mind! The B3121 battery from Braille is their lightest do-everything battery available, offering 1380 pulse cranking amps that can crank over V8 engines with ease while still coming in at under 22 pounds, half of the weight of a standard Group 34 battery! This is thanks to their Advanced AGM racing technology that allows them to put a ton of power into a very small package. Physical Specifications: BCI Group: All sizes Weight: 21lbs / 9.5kg Length: 6.6" / 168mm Width: 5.2" / 132mm Height: 6.8" / 173mm Polarity: Right Side Positive Terminal Type: Steel terminal block with M6 bolt Performance Specifications: Voltage: 12v Recharge Voltage: 14.4V – 14.6V Maintenance charge voltage: 13.8V 5s Pulse Cranking Amps (PCA): 1380 10s PDC: 124 Amp Hour (Ah): 31 Watt Hour (Wh): 372 Life Cycle @ 10% DOD: 3100 Charging Temperature 0C to 50C Discharge Temperature range -40C to +60C Storage temperature -40C to +60C *THIS BATTERY REQUIRES A CUSTOM MOUNTING SOLUTION. The size and weight are significantly smaller than a stock battery and will not be held in place by the stock battery mount*
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Febi Camshaft Position Sensor - Intake - E39 E46 E53 E60 E83 Z3 Z4
Febi Camshaft Position Sensor - Intake - E39 E46 E53 E60 E83 Z3 Z4 ...
Includes o-ring.
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Febi - Corporate Logo
T#:591868
Part#: 12147539165
In Stock
$ 31.99 USD
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$ 31.99 USD
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Innovate LC-2 Wideband O2 Controller Kit
Innovate LC-2 Wideband O2 Controller Kit
Innovate Motorsports - Corporate Logo
T#:28836410
Part#: 38770
In Stock at Vendor
$ 212.99 USD
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$ 212.99 USD
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Features & Benefits:

Two configurable linear 0-5V analog outputs Ability to calibrate O2 sensors for maximum accuracy Includes LC-2 controller and Bosch wideband O2 sensor Comes with a program cable, manual, and a 10 ft. sensor cable Includes a 1-inch mild steel exhaust bung Innovate MTS serial in/out capability Integrated dual-color status LED (green/red) Patented DirectDigital™ wideband sensor control Positive lock connectors for all connections Real-time display data on screen or with the powerful LogWorks software Range:

AFR (Air-Fuel Ratio) range from 7.4:1 to 22.4:1 (0.5 to 1.5 lambda)

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Braille Performance Intensity Carbon Lithium-ION Battery - i48CX - 10.5lbs
Braille Performance Intensity Carbon Lithium-ION Battery - i48CX - 10...
This item is classified as Hazardous Materials and requires special shipping and handling. We cannot ship this item out of the US or with priority shi
Braille - Corporate Logo
T#:558047
Part#: I48CX
Ships in 6 Business Days
$ 1,164.99 USD
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$ 1,164.99 USD
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The ultra-lightweight, standard height I48CX lithium-ION battery from Braille Battery is a popular choice among BMW enthusiasts looking for a drop-in replacement battery that shaves off a ton of weight, 35 pounds in total! Thanks to the Group 48 design of this battery, no modifications are needed for installation. This is perfect for anyone looking to drive their car both on and off of the track, without any negative side effects, and wants a battery with a 10-15 year life span!
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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
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$ 65.00 USD
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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.
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Exhaust Camshaft Sensor - E46 E39 E38 E60 E63 E65 X3 X5 Z3 Z4
Exhaust Camshaft Sensor - E46 E39 E38 E60 E63 E65 X3 X5 Z3 Z4 ...
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:338260
Part#: 12147518628HK
In Stock
Starting at $ 79.98 USD
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Starting at $ 79.98 USD
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This is the exhaust cam position sensor for cars with M52, M54, N62 engines. Choose either Genuine BMW or Hella brand. Hella manufactures the highest quality parts and is an OEM supplier to BMW. Includes BMW part numbers 12147518628 and 12141748398. Replaces BMW part number 12141438082.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1999-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 530i 545i
2004-2005 E63 BMW 645ci
2002-2005 E65 BMW 745i 745li
2004-2006 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
2004-2006 E53 BMW X5 4.4i 4.8i
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
2003-2006 E85 BMW Z4 2.5i Z4 3.0i
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Endurance Series AGM Battery - B48-H6-L3
Endurance Series AGM Battery - B48-H6-L3
Braille - Corporate Logo
T#:36947237
Part#: B48-H6-L3
Ships in 5 Business Days
$ 398.99 USD
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$ 398.99 USD
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Braille Performance GreenLite Lithium-ION Battery - G30 - 5.5lbs
Braille Performance GreenLite Lithium-ION Battery - G30 - 5.5lbs ...
Braille - Corporate Logo
T#:558046
Part#: G30
Ships in 7 Business Days
$ 522.99 USD
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$ 522.99 USD
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The G30 lithium battery from Braille is designed for the Import Tuner market (4 and 6 cylinder) for track use and has enough power for small black V8 race cars and hot rods with light electrical demands/accessories and standard compression. The G30 comes in the popular ETX 30 Group size, just like the B3121 AGM, so it is small and light enough to mount in a variety of locations. Incorporated in this battery is the same technology used in their race winning batteries used by nearly every OEM developer in classes ranging from SCCA to Formula 1.
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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
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$ 34.99 USD
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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
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Knock Sensor
Knock Sensor
5X Entries Into Our F80 M3 Sweepstakes
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Meyle - Corporate Logo
T#:35964551
Part#: 13627568422
Back Ordered
$ 75.99 USD
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$ 75.99 USD
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This sensor detects engine knocking or pinging and adjusts the timing to ensure optimal engine performance and efficiency.
Febi Camshaft Position Sensor
Febi Camshaft Position Sensor
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:368897
Part#: 12147518628
Ships in 2 Business Days
$ 48.99

This product was last offered at the strikethrough price on
09-01-2026

$ 40.99 USD
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$ 40.99 USD
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A faulty cam sensor can lead to issues like difficulty starting and stalling at low speeds. Replacing the cam sensor often resolves many drivability problems. Requires O-ring #12141748398 (not included).
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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
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$ 5.99 USD
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Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Red in color and 12 Gauge.
Meyle Exhaust Camshaft Position Sensor - BMW S54 S62
Meyle Exhaust Camshaft Position Sensor - BMW S54 S62
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:55497462
Part#: 3148000038
Ships in 8 Business Days
New Item
$ 27.99

This product was last offered at the strikethrough price on
09-14-2026

$ 25.99 USD
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$ 25.99 USD
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Don't let a failing camshaft position sensor rob your vehicle of power or cut your track day short. This Meyle replacement camshaft sensor is built to deliver fast, highly accurate data to the ECU, preventing the performance drops, sluggish throttle response, and rough idling caused by worn-out factory electronics. Engineered to withstand high underhood heat and intense vibrations, it keeps your ignition timing and fuel delivery tightly synced, whether you are daily driving or pushing through high-RPM pulls.
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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
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$ 3.99 USD
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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 (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
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$ 4.99 USD
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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 - 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
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$ 4.99 USD
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Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Orange 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
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$ 4.99 USD
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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 - 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
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$ 4.99 USD
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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 - 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
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$ 4.99 USD
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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 - 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
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$ 4.99 USD
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Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Blue in color and 12 Gauge.
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 in 5 Business Days
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$ 21.99 USD
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$ 21.99 USD
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Alternator
Alternator
Febi - Corporate Logo
T#:56544002
Part#: 12317501690
Special Order: No Guaranteed ETA
New Item
$ 245.99 USD
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$ 245.99 USD
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Trust Febi Bilstein for clean power output and dependable performance every time you start your engine.
Crankshaft Sensor With Sealing Ring
Crankshaft Sensor With Sealing Ring
Febi - Corporate Logo
T#:56507847
Part#: 12141709616
Special Order: No Guaranteed ETA
New Item
$ 14.99 USD
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$ 14.99 USD
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Keep your BMW’s engine management system operating at peak performance with this replacement crankshaft position sensor from Febi Bilstein.
Oil Temperature Sensor And Gauge Kit - Blue & Red - Multiple BMWs
Oil Temperature Sensor And Gauge Kit - Blue & Red - Multiple BMWs ...
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:401689
Part#: OILTEMPGAUGEBRKK
Back Ordered
Sale - Save 2% $ 196.99

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

$ 193.26 USD
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Sale - Save 2%
$ 196.99

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

$ 193.26 USD
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The EVO series from ProSport Gauges is an award winning, industry leading option for those looking to push their car's limits. They allowing you to monitor crucial engine functions in one quick glance with advanced precision. Featuring a dual color readout, you can customize your readout to your liking. Offering a user friendly readout with a digital reading in the center with a bar-graph style sweep around the gauge as well.
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