BMW Electrical Sensors, Switches, & Relays for BMW Z Series E85/6 (2003-2008)

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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 - Corporate Logo
T#:558037
Part#: B14115
Ships in 5 Business Days
$ 204.99 USD
Free Shipping on orders $49 and up
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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Braille - Corporate Logo
T#:558038
Part#: B2015
Ships in 7 Business Days
$ 237.99 USD
Free Shipping on orders $49 and up
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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Camshaft Position Sensor - S54, S62
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URO - Corporate Logo
T#:44461483
Part#: 13627796054
In Stock
$ 40.99 USD
Free Shipping on orders $49 and up
Provides dependable performance, reliability, and value in one essential component.

Braille - Corporate Logo
T#:558042
Part#: B3121
Ships in 6 Business Days
$ 270.99 USD
Free Shipping on orders $49 and up
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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Meyle - Corporate Logo
T#:369703
Part#: 12141709616
Ships on Sep 29, 2026
$ 46.99 USD
Free Shipping on orders $49 and up
Does not include O-ring
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
Free Shipping
This sensor is attached to the brake master cylinder

Parking Aid Sensor
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URO - Corporate Logo
T#:37858371
Part#: 66206989068
Ships in 1 Business Day
$ 31.99 USD
Free Shipping on orders $49 and up
$ 31.99 USD
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This replacement PDC sensor is positioned behind the front and rear bumpers and serves as a direct replacement for any broken, missing, or faulty sensor.
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 4 Business Days
$ 1,164.99 USD
Free Shipping on orders $49 and up
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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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
Free Shipping on orders $49 and up

Braille - Corporate Logo
T#:36947237
Part#: B48-H6-L3
Ships in 4 Business Days
$ 398.99 USD
$ 398.99 USD
Precision Raceworks - Corporate Logo
T#:35559424
Part#: 201-0411
In Stock
$ 34.99 USD
Free Shipping on orders $49 and up
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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URO Eccentric Shaft Sensor - 11377524879
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URO - Corporate Logo
T#:28171561
Part#: 11377524879
Ships in 1 Business Day
$ 174.99 USD
Free Shipping on orders $49 and up

The eccentric shaft sensor plays a vital role in controlling valvetronic timing and is often a common issue in BMW vehicles. If you've noticed difficult starts, reduced fuel economy, and overall engine power and performance issues, this component could be the culprit.

Key Features:

Guaranteed Fitment: Designed to fit perfectly, ensuring compatibility with your vehicle. Accurate Positioning: Provides precise shaft position control, even at high RPMs. Direct OE Replacement: Easy to install with its direct-fit design, saving time and effort. Low Electrical Resistance: Alloy connector conductors minimize resistance, ensuring accurate signal transmission. Upgrade to this quality replacement eccentric shaft sensor to restore optimal engine performance and address the symptoms associated with a faulty sensor.

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Braille - Corporate Logo
T#:558046
Part#: G30
Ships on Aug 10, 2026
$ 522.99 USD
Free Shipping on orders $49 and up
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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Knock Sensor
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Meyle - Corporate Logo
T#:35964551
Part#: 13627568422
In Stock
$ 75.99 USD
Free Shipping on orders $49 and up
This sensor detects engine knocking or pinging and adjusts the timing to ensure optimal engine performance and efficiency.
Dahler Tuning - Corporate Logo
T#:13727071
Part#: DAHELECS-ATTC
Special Order: No Guaranteed ETA
$ 425.00 USD
Free Shipping
$ 425.00 USD
Free Shipping
This anti-theft throttle controller from Dahler lets you custom-tune your throttle's responsiveness and the security of your vehicle. With 5 preset modes from valet mode to track mode, there are no limits to what you can do. The anti-theft feature completely disables the throttle when activated, so when if in an unfortunate theft situation, even with the car started and in gear, there is no way your car can move, saving your vehicle from falling into someone else's less-than-legal possession. COMFORT MODE (blue) Unfamiliar terrain and too much traffic? This mode lets you take it easy. Your gas pedal reacts less sensitively – especially when starting off. Your stress level will thank you. ECO MODE (green) $5.00 a gallon? There are a few tricks you can use to save fuel and money when driving. This driving program supports you in reducing the average fuel consumption of your BMW if certain rules of economical driving are observed. SPORT MODE (red) This driving program gives your vehicle a much sportier character. Your BMW reacts with a significantly better response and a straighter acceleration. The response time of the engine is significantly improved. TRACK MODE (purple) If you are not yet satisfied with the sports program and you like to push yourself to the limit, then give it a try. For those who go on tracks or run cars with 85 Ethanol this mode might be the right choice.
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Negative Battery Cable T Bolt
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URO - Corporate Logo
T#:377975
Part#: 61128373946T
Ships in 1-2 days
$ 9.77 USD
Free Shipping on orders $49 and up
Replace the T bolt for securing the battery cable without replacing the whole cable

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
Free Shipping on orders $49 and up

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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Fluid Level Sensor
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URO - Corporate Logo
T#:369510
Part#: 17137524812
In Stock
$ 10.59 USD
Free Shipping on orders $49 and up
This sensor is used in multiple locations, depending on model: coolant level, washer level, and power steering level

Electrical Connector - Priced Each
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URO - Corporate Logo
T#:367145
Part#: 61132359999
Ships in 1 Business Day
$ 18.99 USD
Free Shipping on orders $49 and up
2 pin used in many locations on late model BMWs
Temperature Sensor
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URO - Corporate Logo
T#:37892090
Part#: 13621433076
In Stock
$ 10.34 USD
Free Shipping on orders $49 and up
Temperature sensor for monitoring coolant and oil

URO - Corporate Logo
T#:52621857
Part#: 12141709616
In Stock
New Item
$ 25.99 USD
Free Shipping on orders $49 and up
The URO Parts 020655 Crankshaft Position Sensor offers a cost-effective alternative to expensive OE components without sacrificing quality or longevity.

Bushing Contact With Wire Lead - Priced Each
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URO - Corporate Logo
T#:14783536
Part#: 61130005199
In Stock
$ 3.99 USD
Free Shipping on orders $49 and up
Hitachi - Corporate Logo
T#:48850055
Part#: 12147518628
Ships in 2 Business Days
$ 71.99 USD
Free Shipping on orders $49 and up
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 - Corporate Logo
T#:48850072
Part#: 12147539165
In Stock at Vendor
$ 41.99 USD
Free Shipping on orders $49 and up
$ 41.99 USD
Free Shipping on orders $49 and up
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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Hitachi - Corporate Logo
T#:48815471
Part#: 13627525015
Ships in 6 Business Days
$ 66.99 USD
Free Shipping on orders $49 and up
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.
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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.

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.

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.
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.

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.
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.

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.

Precision Raceworks - Corporate Logo
T#:38161703
Part#: 201-0360-BLU
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. Blue in color and 12 Gauge.
Meyle - Corporate Logo
T#:55497462
Part#: 3148000038
Ships on Nov 12, 2026
New Item
$ 26.99 USD
$ 26.99 USD
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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Hitachi - Corporate Logo
T#:48815470
Part#: 12141709616
Back Ordered
$ 32.99 USD
Free Shipping on orders $49 and up
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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Crankshaft Position Sensor
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URO - Corporate Logo
T#:35863159
Part#: 13627525015
In Stock
$ 28.99 USD
Free Shipping on orders $49 and up
Having a crank but no starting issue? This sensor is often the culprit