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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Turner Motorsport - Corporate Logo
T#:597496
Part#: 014579TMSKT
In Stock
Sale - Save 25% $ 136.36

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06-14-2026

$ 102.27 USD
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$ 136.36

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$ 102.27 USD
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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
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Sale - Save 25%
$ 89.99

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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.
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Turner Motorsport - Corporate Logo
T#:391751
Part#: 014579TMS
Ships in 1 day
Sale - Save 16% $ 213.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 179.23 USD
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Sale - Save 16%
$ 213.99

This product was last offered at the strikethrough price on
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Starting at $ 179.23 USD
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All vehicles will lose some degree of performance due to heat soak under the right operating conditions.  Engine management systems constantly monitor operating conditions and modifying parameters based on sensor inputs. BMW integrated the intake air temp sensor in the MAF housing on models such as the E39 M5, and, being sandwiched behind a hot radiator and in some applications next to an even hotter valve cover, this is less than ideal for performance applications. Absorbing excess heat from its surroundings, the MAF can’t shed it fast enough, and the ECU reads an inaccurately high intake air temperature. Compensating for this false hot air measurement, the ECU pulls timing and runs a richer fuel mixture, resulting in a significant loss of torque.

What can you do?  Locate an intake air temp sensor in a location where it can properly measure incoming air temps and where it's less prone to heat soak. Mounting the sensor further away from the heat source and isolating it from the MAF housing, it can both resist the effects of heat soak longer and respond to temperature changes more quickly.  The result is you’ll experience reduced torque loss and more consistent power output when you’re pushing your engine hard. 

The Turner engineering team was initially skeptical of the claimed performance benefits of this modification. They first set out validate the functionality and performance benefit of a temp sensor relocation. Replicating stop-and-go traffic heat soak in a 2001 540i was a simple task in a controlled environment - their dynometer. First the car was heat soaked to simulate being stuck in traffic or moving at low speeds by running the car four times on the dyno with the dyno's cooling fans disabled. The fans were then turned on for three more runs to observe the recovery rate once air flow was reintroduced. The test: following this procedure once with a stock IAT, and once with their relocation kit in place. 

The result? Turner recovered 11lb-ft torque at 2500rpm through use of their relocation kit, with even greater recovery to be found for M5 owners. Here are the heat soak-related torque losses Turner experienced:

Stock IAT location:
18rwtq at 2500rpm
10rwtq at 3000rpm
9rwtq at 3700rpm

Turner IAT Relocation:
7rwtq at 2500rpm
5rwtq at 3000rpm
5rwtq at 3700rpm

**Click here for installation instructions**

The Turner engineering team designed a complete plug and play kit (unlike all other options on the market) that makes for quick, easy, and reversible installation. Weather-sealed connectors keep out the elements, while sheathed wiring offers a clean appearance underhood. With a harness nearly 3 feet long - the Turner IAT relocation kit offers flexibility in positioning, but not too long that you're left with unsightly excess wiring. Turner recommends positioning the sensor in a location away from engine heat, but still within the intake ducting to achieve accurate intake temp readings - such as the far side of the base of the airbox. Vehicles with cold air intakes with cone-style filters can even position the sensor in the end of the filter. Simply drill a hole in your (cool) location of choice and plug in the harness. More information including installation instructions and some good examples of sensor mounting locations can be found in our DIY PDF. 

We include everything you need to relocate your IAT, just select your desired sensor brand below - Genuine BMW or original equipment Beru.

Also the perfect plug-n-play option for anyone looking to upgrade their intake to utilize an Alpha-N tune!

Note for vehicles with M62 engine: applicable to 1999 and up

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Turner Motorsport - Corporate Logo
T#:638071
Part#: 014579TMSKT1
In Stock
Sale - Save 25% $ 150.99

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

$ 113.24 USD
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Sale - Save 25%
$ 150.99

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

$ 113.24 USD
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What can you do to get rid of this heat soak? Turner designed an IAT relocation kit that moves the intake air temp sensor to a cooler location. Mounting the sensor further away from the heat source and isolating it from the MAF housing, it can both resist the effects of heat soak longer and respond to temperature changes more quickly. The result is you’ll experience reduced torque loss and more consistent power output when you’re pushing your engine hard.
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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
Ships in 5 Business Days
$ 31.99 USD
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$ 31.99 USD
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Camshaft Position Sensor - S54, S62
2X Entries For Our G87 M2 Sweepstakes!
URO - Corporate Logo
T#:44461483
Part#: 13627796054
In Stock
$ 40.99 USD
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Provides dependable performance, reliability, and value in one essential component.

DSC Pressure Sensor
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URO - Corporate Logo
T#:567281
Part#: 34521164458
In Stock
$ 152.99 USD
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$ 152.99 USD
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This sensor is attached to the brake master cylinder
URO Camshaft Position Sensor - BMW E36 Z3 M42 M44
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URO - Corporate Logo
T#:591864
Part#: 12141743072
Ships in 1 Business Day
$ 36.99 USD
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URO Camshaft Position Sensor - BMW E36 Z3 M42 M44

The URO Camshaft Position Sensor - BMW E36 Z3 M42 M44 is an essential component for precise engine timing and efficient performance. Also known as the pulse generator, this sensor mounts to the side of the cylinder head and detects the camshaft’s position to optimize fuel injection and ignition timing. A failing sensor can trigger engine fault codes, cause rough idling, misfires, or poor fuel economy. Replacing a faulty camshaft position sensor restores accurate timing, ensuring smooth operation and peak efficiency for your BMW E36, Z3, M42, or M44 engine.

  • Direct replacement for BMW E36, Z3, M42, and M44 engines
  • Detects camshaft position for precise engine timing
  • Helps optimize fuel injection and ignition performance
  • Eliminates rough idling, misfires, and poor fuel economy
  • Designed for durability and long-lasting performance
  • Restores smooth operation and prevents engine fault codes
  • OE-style fitment for easy installation
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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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Oil Level Sensor
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URO - Corporate Logo
T#:590151
Part#: 12617508003
Ships in 1 Business Day
$ 63.99 USD
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$ 63.99 USD
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OMP - Corporate Logo
T#:1614
Part#: EA-462
In Stock
$ 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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URO Battery Hold Down Clamp - BMW E92 335xi
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URO - Corporate Logo
T#:37925905
Part#: 61217566618
In Stock
$ 12.99 USD
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URO Battery Hold Down Clamp - BMW E92 335xi

URO Battery Hold Down Clamp - BMW E92 335xi is a premium solution for repairing your damaged or broken factory battery hold down. This new clamp is designed to restore the proper positioning and securement of your vehicle's battery, ensuring it remains firmly in place during operation. Manufactured to meet OE specifications, it guarantees a perfect fit and easy installation. Made from high-quality materials, the URO Battery Hold Down Clamp is engineered to withstand harsh operating conditions, including intense vehicle heat and corrosive battery fumes, providing long-lasting durability and reliability.

Key Benefits:

  • Direct-fit OE replacement ensures easy installation and secure battery positioning
  • High-quality materials resist heat and corrosive battery fumes for enhanced durability
  • Restores battery hold down function, preventing battery movement during operation
  • Built to withstand harsh conditions for long-lasting reliability

With the URO Battery Hold Down Clamp - BMW E92 335xi, you can ensure your battery is securely held in place, contributing to the overall reliability and safety of your vehicle.

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Temperature Sensor
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URO - Corporate Logo
T#:37892090
Part#: 13621433076
In Stock
$ 10.34 USD
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Temperature sensor for monitoring coolant and oil
URO Camshaft Position Sensor - For BMW M52 M54 Engines
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URO - Corporate Logo
T#:37925886
Part#: 12141438082
Ships in 1 Business Day
$ 15.99 USD
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URO Camshaft Position Sensor - For BMW M52 M54 Engines

URO Camshaft Position Sensor - For BMW M52 M54 Engines is the perfect solution for restoring proper engine operation when your original camshaft position sensor has failed. This direct-fit OE replacement sensor eliminates trouble codes and check engine lights, ensuring smooth engine performance. Made from high-quality polymer and metal materials, this sensor is designed to withstand the intense heat of your BMW’s engine. With alloy conductors that minimize electrical resistance, the sensor provides accurate operation across all engine RPMs. Built for reliability and long-lasting performance, it’s the ideal choice for your BMW M52 or M54 engine.

Key Benefits:

  • Direct-fit OE replacement for easy, plug-and-play installation
  • Restores proper engine operation by eliminating trouble codes and check engine lights
  • High-quality polymer and metal construction withstands the intense heat of the engine
  • Alloy conductors minimize electrical resistance for precise operation at any engine RPM
  • Engineered for reliability and longevity, providing long-term performance and peace of mind

Upgrade your BMW M52 or M54 engine with the URO Camshaft Position Sensor and enjoy reliable engine performance.

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Electrical Connector - Priced Each
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URO - Corporate Logo
T#:367145
Part#: 61132359999
Ships in 1 Business Day
$ 18.99 USD
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2 pin used in many locations on late model BMWs

URO - Corporate Logo
T#:52621857
Part#: 12141709616
In Stock
New Item
$ 25.99 USD
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The URO Parts 020655 Crankshaft Position Sensor offers a cost-effective alternative to expensive OE components without sacrificing quality or longevity.

Brake Switch - 4 Prong
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URO - Corporate Logo
T#:373217
Part#: 61318360417
Ships in 1 Business Day
$ 15.52 USD
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$ 15.52 USD
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Located on the brake pedal, this switch is vital to your brake light function. In the event that your vehicle's brake lights are not working and simultaneously showing a "brake light circuit failure", you should replace this part.
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Bushing Contact With Wire Lead - Priced Each
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URO - Corporate Logo
T#:14783536
Part#: 61130005199
In Stock
$ 3.99 USD
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Hitachi - Corporate Logo
T#:48850055
Part#: 12147518628
Ships in 2 Business Days
New Item
$ 71.99 USD
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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.
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Hitachi Camshaft Position Sensor - Intake - BMW M52TU M54
For vehicles with production date from 09/1998
Hitachi - Corporate Logo
T#:48850072
Part#: 12147539165
In Stock at Vendor
New Item
$ 41.99 USD
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$ 41.99 USD
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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 drivabilty issues. Uses O-ring # 12 141 748 398 (not included)
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Febi Camshaft Position Sensor
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Febi - Corporate Logo
T#:368897
Part#: 12147518628
In Stock at Vendor
$ 48.99

This product was last offered at the strikethrough price on
07-16-2026

$ 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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Packaged by Turner - Corporate Logo
T#:401690
Part#: OILTEMPGAUGEKT1
Ships on Dec 1, 2026
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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Packaged by Turner - Corporate Logo
T#:401689
Part#: OILTEMPGAUGEBRKK
Ships on Dec 1, 2026
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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Hitachi - Corporate Logo
T#:48815470
Part#: 12141709616
Back Ordered
$ 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....
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
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 - Corporate Logo
T#:48850070
Part#: 12321739435
Back Ordered
New Item
$ 60.99 USD
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$ 60.99 USD
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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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