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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Genuine BMW Battery Cable - Negative
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Genuine BMW - Corporate Logo
T#:39385
Part#: 12422245473
Ships in 9 Business Days
3% off MSRP $ 64.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 62.99 USD
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3% off MSRP
$ 64.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 62.99 USD
Free Shipping on orders $49 and up


Genuine BMW Battery Cable Negative -
This item fits the following BMW Chassis:
E36

Fits BMW Engines including:
M42,M44

Wiring Harness - Engine Module - Z3
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Genuine BMW - Corporate Logo
T#:39587
Part#: 12511438514
Ships in 9 Business Days
4% off MSRP $ 767.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 740.99 USD
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4% off MSRP
$ 767.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 740.99 USD
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Genuine BMW ENGINE WIRING HARNESS, ENGIN
Fits BMW Engines including:
M52

Genuine BMW Earth Strap For Engine Hood - 65311743410
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Genuine BMW - Corporate Logo
T#:154535
Part#: 65311743410
Ships in 10 Business Days
3% off MSRP $ 36.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 35.99 USD
Free Shipping on orders $49 and up
3% off MSRP
$ 36.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 35.99 USD
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Genuine BMW EARTH STRAP FOR ENGINE HOOD

Wire With Terminals For 90 Degree 6 Pin Bulkhead (Red)
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Precision Raceworks - Corporate Logo
T#:38161695
Part#: 201-0360-RED
Ships in 6 Business Days
$ 5.99 USD
Free Shipping on orders $49 and up
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Red in color and 12 Gauge.

Battery Cable (Plus Pole) - Z3
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Genuine BMW - Corporate Logo
T#:135862
Part#: 61107893586
Ships in 9 Business Days
3% off MSRP $ 380.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 367.99 USD
Free Shipping
3% off MSRP
$ 380.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 367.99 USD
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Genuine BMW Battery Cable (Plus Pole) - Sbk

Wire Pinning Kit - MLK 1.2 Female Jack
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Genuine BMW - Corporate Logo
T#:55281746
Part#: 125275WRKT
Ships in 10 Business Days
New Item
$ 37.40 USD
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This Genuine BMW wiring repair kit is the ideal solution to refresh worn-out terminal connections in your Ultimate Driving Machine.

Wire With Terminals For 90 Degree 6 Pin Bulkhead - Black - Dual 18 Ga...
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Precision Raceworks - Corporate Logo
T#:38161710
Part#: 201-0362
Ships in 9 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
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
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Precision Raceworks - Corporate Logo
T#:38161703
Part#: 201-0360-BLU
Ships in 9 Business Days
$ 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.

Wire With Terminals For 90 Degree 6 Pin Bulkhead (Black) 12 Gauge ...
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Precision Raceworks - Corporate Logo
T#:38161711
Part#: 201-0360-BLK
Ships in 9 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
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 - Orange
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Precision Raceworks - Corporate Logo
T#:38161698
Part#: 201-0360-ORG
Ships in 9 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
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 (White)
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Precision Raceworks - Corporate Logo
T#:38161693
Part#: 201-0360-WHT
Ships in 9 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
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 - Yellow
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Precision Raceworks - Corporate Logo
T#:38161692
Part#: 201-0360-YEL
Ships in 9 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
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 (Green)
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Precision Raceworks - Corporate Logo
T#:38161687
Part#: 201-0361-GRN
Ships in 9 Business Days
$ 3.99 USD
Free Shipping on orders $49 and up
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Green in color and 18 Gauge.
Wiring Support Restraint System -Belt Tensioner - Z3
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Genuine BMW - Corporate Logo
T#:135840
Part#: 61106908137
Special Order: No Guaranteed ETA
5% off MSRP $ 19.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 18.99 USD
Free Shipping on orders $49 and up
5% off MSRP
$ 19.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 18.99 USD
Free Shipping on orders $49 and up
Genuine BMW WIRING SUP.RESTRAINT SYS./BE
Morimoto Standalone Can-Bus Wiring Harness - H4 / 9003 - Priced Each ...
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Morimoto - Corporate Logo
T#:54388428
Part#: H240
Ships on Jul 15, 2026
New Item
Sale - Save 17% $ 21.99

This product was last offered at the strikethrough price on
06-23-2026

$ 18.21 USD
Free Shipping on orders $49 and up
Sale - Save 17%
$ 21.99

This product was last offered at the strikethrough price on
06-23-2026

$ 18.21 USD
Free Shipping on orders $49 and up

Camshaft Speed Sensor
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Bremmen Parts - Corporate Logo
T#:52832891
Part#: 12141743072
In Stock
New Item
Sale - Save 20% $ 39.99

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

$ 31.99 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 39.99

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

$ 31.99 USD
Free Shipping on orders $49 and up

Bosch Alternator - 120 Amp - E46, E39, Z3 2001-2005 (with factory Val...
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Bosch - Corporate Logo
T#:386207
Part#: AL0703X
Ships on Jul 23, 2026
$ 844.99 USD
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$ 844.99 USD
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120 amp Bosch alternator for many BMW 6 cylinders (see list below). Replaces stock Valeo alternator with rectangular plug on the back. Bosch is an original equipment supplier to BMW, and is the finest and most recognized German brand of alternator available. Buy only the best alternator for your BMW -- buy a Bosch alternator. Same as BMW part#1231751599. 

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their exacting assembly process and high level of durability you can expect a long service life from all Bosch products.

A refundable core charge must be applied to this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge. 

This alternator has a rectagular connector on the back! Please check to ensure you are getting the correct alternator  

This Bosch Alternator fits the following BMWs:
1998-2000  E39 5 Series  528i
2001-2003  E39 5 Series  525i & 530i
2001-2005  E46 3 Series  325i, 325Ci, 325xi - only for cars with M54 engine
2001-2005  E46 3 Series  330i, 330Ci & 330xi
2001-2002  Z3 Roadster  Z3 2.5 liter 
2003-2005  Z4 Roadster/Coupe  Z4 2.5 liter & Z4 3.0 liter
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Bosch Alternator - E36 318i/is, Z3 1.9 Liter 1996-1998
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Bosch - Corporate Logo
T#:224712
Part#: AL0736X
Ships on Jul 23, 2026
$ 421.99

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

$ 411.99 USD
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$ 411.99 USD
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Replacement 90 amp Bosch alternator for e36 318i/is with either the M42 or M44 engine and Z3 1.9 liter roadster, with the M44 4 cylinder engine. Bosch is an original equipment supplier to BMW, and is the finest and most recognized German brand of alternator available. Buy only the best alternator for your BMW -- buy a Bosch alternator.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their exacting assembly process and high level of durability you can expect a long service life from all Bosch products.

A refundable core charge must be applied to this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge.

This Bosch Alternator fits the following BMWs:
1994-1998 E36 BMW 318i 318is 318ti 318ic
1996-1998 Z3 Roadster 1.9 liter 4 cylinder
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2 Pin Connector
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ECS - Corporate Logo
T#:33412928
Part#: 12521427615
Ships on Jul 27, 2026
Sale - Save 25% $ 7.99

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

$ 5.99 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 7.99

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

$ 5.99 USD
Free Shipping on orders $49 and up
Includes connector housing with terminals and seals. Commonly used for the engine oil pressure switch. ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need. Each connector includes an additional terminal in case one becomes lost or damaged during installation. *OEM cross reference PN# 12521427615 - Commonly used for the engine oil pressure switch. Please reference the original part number from the existing connector to confirm fitment, before ordering. Suggested tools: Suggested crimping pliers: T#387193 Wire De-pin tools: 12pc De-Pin Tool Set - T#386379 23pc De-Pin Tool Set - T#641943
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2 Pin Connector
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ECS - Corporate Logo
T#:33412932
Part#: 61132359999
Ships on Jul 28, 2026
Sale - Save 25% $ 10.99

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

$ 8.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 10.99

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

$ 8.24 USD
Free Shipping on orders $49 and up

Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 61132359999 - Commonly used for the coolant level sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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Bav Auto Temperature Sensor - BMW E39 E46 E9X E60 F01/02
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Bavarian Autosport - Corporate Logo
T#:639833
Part#: 13621433076
In Stock
Sale - Save 20% $ 14.99

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

$ 11.99 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 14.99

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

$ 11.99 USD
Free Shipping on orders $49 and up
This is the coolant temperature sensor used in many BMW models from the late-1990s to the mid-2010s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer. This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Oil Temperature Sensor And Gauge Kit - Green & White - Multiple BMWs ...
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Packaged by Turner - Corporate Logo
T#:401690
Part#: OILTEMPGAUGEKT1
Ships on Nov 5, 2026
Sale - Save 2% $ 196.99

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

$ 193.26 USD
Free Shipping
Sale - Save 2%
$ 196.99

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

$ 193.26 USD
Free Shipping
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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Oil Temperature Sensor And Gauge Kit - Blue & Red - Multiple BMWs ...
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Packaged by Turner - Corporate Logo
T#:401689
Part#: OILTEMPGAUGEBRKK
Ships on Nov 5, 2026
Sale - Save 2% $ 196.99

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

$ 193.26 USD
Free Shipping
Sale - Save 2%
$ 196.99

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

$ 193.26 USD
Free Shipping
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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Re-manufactured Starter Motor - Priced Each
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Bosch - Corporate Logo
T#:3471789
Part#: 124123547095KT
Back Ordered
$ 346.99

This product was last offered at the strikethrough price on
04-09-2026

$ 327.99 USD
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$ 327.99 USD
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Price Included a $40.00 Core Charge


Hitachi Crankshaft Position Sensor - BMW M52 S52 M54
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Hitachi - Corporate Logo
T#:48815470
Part#: 12141709616
Back Ordered
New Item
$ 32.99 USD
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NOTE: Does not include o-ring seal - see BMW # 12141748398 This is the crankshaft 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 Hitachi sensor to restore peak performance.
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URO - Camshaft Position Sensor - E46 323Ci, E46 325i, E39 528i, Z3 2....
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URO - Corporate Logo
T#:33679726
Part#: 12147539165
Back Ordered
$ 18.99 USD
Free Shipping on orders $49 and up

URO Camshaft Position Sensor is a premium replacement component specifically designed for BMW vehicles, ensuring optimal engine performance and reliability. Manufactured by Turner Motorsport, this camshaft position sensor plays a crucial role in maintaining accurate timing and enhancing overall engine efficiency. By upgrading to the URO Camshaft Position Sensor, BMW owners can expect improved engine responsiveness and a significant reduction in potential diagnostic trouble codes.

  • Enhanced Engine Performance: Ensures precise timing and efficient engine operation, contributing to superior overall performance.
  • Durable Construction: Crafted from high-quality materials that withstand extreme conditions for long-lasting durability.
  • Easy Installation: Designed for a direct fit, facilitating straightforward installation for both professionals and DIY enthusiasts.
  • Reliable OEM Replacement: Matches OEM specifications, providing peace of mind and preserving the integrity of the vehicle.
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Hitachi Voltage Regulator - BMW E36 Z3 E34
For 115A Valeo alternators
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Hitachi - Corporate Logo
T#:48850070
Part#: 12321739435
Back Ordered
New Item
$ 60.99 USD
Free Shipping on orders $49 and up
$ 60.99 USD
Free Shipping on orders $49 and up
Alternator voltage regulators are a crucial component that controls the alternator's output, preventing overcharging by adjusting the current to keep vehicle voltage within a safe range, protecting the battery and electrical system. Symptoms of failure include dim lights, battery warnings, or a dead battery, often requiring replacement, which can be internal or external to the alternator
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Alternator
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We Price Match - Give Us A Call or Chat!
Valeo - Corporate Logo
T#:594102
Part#: 12311247288
Back Ordered
$ 547.99

This product was last offered at the strikethrough price on
05-08-2026

$ 532.99 USD
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$ 532.99 USD
Free Shipping on orders $49 and up
Replacement Alternator from Valeo