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BMW Electrical Sensors, Switches, & Relays

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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Plug And Play ReFlex Plus Install Harness - S58/B58

T#:35761669

Part#: 201-0409

Ships in 1 Business Day

$ 199.99 USD

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$ 199.99 USD

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The **Precision Raceworks S58/B58 Plug-and-Play Install Harness for the Motiv ReFlex+** is certified by Motiv Motorsports and is an essential upgrade for anyone integrating a ReFlex+ into their S58 or B58 vehicle. This Harness replaces only the signal and power sub harness portion of the Motiv Reflex. Standard universal Motiv ReFlex Plus harness required for use of this Plug and Play Harness - ES#4810312 / ES#4810314 This innovative harness eliminates the need for cutting, crimping, or splicing into your factory wiring, providing a straightforward, fully reversible installation. Simply plug it in, and you're ready to go! ### Why Choose the Precision Raceworks Harness? Although the main harness included with the Motiv ReFlex+ is well-designed, its standard sub-harness requires splicing into the factory wiring. Precision Raceworks addresses this by offering a plug-and-play replacement for the sub-harness. This solution retains the high-quality main harness, avoids unnecessary costs, and simplifies installation for seamless performance. ### Key Features of the Precision Raceworks X58 Harness: - **Motiv Motorsports Certified**, ensuring complete compatibility. - **100% Plug-and-Play** for a quick, hassle-free installation. - **Compatible with Tuning Platforms** such as MHD, MHD+, EcuTek, and BM3. - **Premium Build Quality**, manufactured in an ISO 9001-certified facility using automotive-grade wiring. - **Fast Installation**, completed in as little as one hour. - **Reversible Setup**, preserving the factory harness with no permanent modifications. The Precision Raceworks harness is the ideal choice for ReFlex+ users seeking a reliable, cost-effective, and user-friendly solution without altering their vehicle's original wiring.

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Meyle Crankshaft Position Sensor - E36, E39, E46, E53, E60, E83, Z3, ...

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T#:369703

Part#: 12141709616

Ships on Sep 29, 2026

$ 46.99 USD

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$ 46.99 USD

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Does not include O-ring

Camshaft Position Sensor

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T#:591413

Part#: 12141742185

In Stock at Vendor

$ 108.99

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

$ 104.99 USD

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$ 104.99 USD

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When this sensor fails, it will become impossible to start your car, leaving you stranded.

BMW B58 3.0L Oxygen Sensor - Downstream

T#:5229442

Part#: 11788611294

Ships in 2 Business Days

$ 159.99

This product was last offered at the strikethrough price on
04-10-2026

$ 138.99 USD

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$ 138.99 USD

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BMW B58 3.0L Oxygen Sensor - Downstream is essential for maintaining optimal engine performance and fuel efficiency. Turner Motorsport offers this high-quality replacement sensor designed to precisely measure exhaust oxygen levels, allowing the vehicle's computer to accurately adjust the air/fuel ratio and monitor emissions. A degraded oxygen sensor can lead to decreased engine performance, reduced fuel efficiency, and increased harmful emissions, potentially triggering the Check Engine Light and causing a failure in emissions testing.

Ensures Optimal Engine Performance: Accurately measures exhaust oxygen levels for precise air/fuel ratio adjustments.
Improves Fuel Efficiency: Helps maintain proper fuel mixture, reducing fuel consumption.
Reduces Harmful Emissions: Keeps emissions in check, ensuring compliance with environmental standards.
Prevents Check Engine Light Activation: Helps avoid unnecessary warning lights and potential emissions test failures.
Quality Replacement: High-grade sensor designed specifically for the BMW B58 3.0L engine.

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Knock Sensor

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T#:35964551

Part#: 13627568422

In Stock

$ 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.

Meyle Crankshaft Position Sensor - M60

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T#:5958675

Part#: 12141731887

Ships on Dec 2, 2026

$ 59.99 USD

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$ 59.99 USD

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Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. The crankshaft position sensor measures the speed at which the crank is turning and adjusts fueling via the ECU to match. If it fails, your computer will not know the speed and will fuel it improperly. Installs exactly in the place of your old sensor and will eliminate your car's idle, performance, and misfiring problems.

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Voltage Regulator

T#:596879

Part#: 12321350052

In Stock at Vendor

$ 41.99

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

$ 40.99 USD

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$ 40.99 USD

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If you are having issues with voltage peaking, lights fading in and out as your driving, or your battery keeps dying despite the car running, It could be the result of a faulty voltage regulator. Voltage regulators control the amount of power coming from the alternator.

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Walker MAP Sensor - BMW N20 N26 S55 S63

T#:39059258

Part#: 13627843531

In Stock at Vendor

$ 163.99

This product was last offered at the strikethrough price on
04-10-2026

$ 135.99 USD

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$ 135.99 USD

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This is a replacement Manifold Absolute Pressure sensor Located on the charge air cooler. The MAP controls the amount of fuel that goes through the injectors based on the pressure of air at the intake manifold. If your vehicle is giving you a MAP code, replace it immediately to ensure you get the best gas mileage and performance. It is common for this part to fail slowly and cause poor fuel mileage and hampered performance. When it fails, the vehicle will stutter and stall as it falls into a limp mode. One way to check if your MAP is bad is to unplug the connector before starting your car. If it idles well (compared to a previous poor idle), your MAP sensor likely needs to be replaced. If you let this maintenance part go, your fuel economy will suffer as too much fuel is going into the engine and not being burned. A great way to give your vehicle an efficiency boost.

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Knock Sensor

T#:55353615

Part#: 12141716055

Special Order: No Guaranteed ETA

$ 28.99 USD

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$ 28.99 USD

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This Meyle replacement knock sensor is the perfect solution for keeping your high-performance engine safe and running at its absolute peak.

Crankshaft Pulse Sensor

T#:55030835

Part#: 3148100018

Ships on Oct 30, 2026

$ 15.99 USD

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$ 15.99 USD

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Keep your ultimate driving machine running the way it was engineered to with this reliable replacement.

Crankshaft Position Sensor

T#:55030834

Part#: 3148100013

Ships on Oct 30, 2026

$ 36.99 USD

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$ 36.99 USD

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This Meyle Crankshaft Position Sensor is the perfect solution for restoring the critical engine speed data your ECU relies on.

Meyle Exhaust Camshaft Position Sensor - BMW S54 S62

T#:55497462

Part#: 3148000038

Ships on Nov 12, 2026

$ 26.99 USD

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$ 26.99 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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Meyle Crankshaft Pulse Sensor - BMW EXX, FXX

T#:52762518

Part#: 314810014

Special Order: No Guaranteed ETA

$ 19.99 USD

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$ 19.99 USD

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Revitalize your vehicle’s performance and reliability with the MEYLE Crankshaft Pulse Sensor.

Camshaft Sensor

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T#:36540587

Part#: 12141485845

Special Order: No Guaranteed ETA

$ 32.99 USD

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$ 32.99 USD

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Temperature Sensor

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T#:637028

Part#: 12621710511

Ships on Dec 2, 2026

$ 15.99 USD

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$ 15.99 USD

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Meyle Crankshaft Position Sensor - E31, E38, E39, E52, E60, E63, E64,...

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T#:579358

Part#: 3148990000

Special Order: No Guaranteed ETA

$ 37.99 USD

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$ 37.99 USD

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Referred to as the speed sensor & reference sensor

Meyle Crank Position Sensor - E36, E34

T#:55497425

Part#: 3148998003

Special Order: No Guaranteed ETA

$ 25.99 USD

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$ 25.99 USD

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Don't let a basic sensor keep your E36 or E34 off the tarmac—swap in this high-quality Meyle unit and drive with confidence.

Coolant Temperature Sensor

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T#:5886984

Part#: 13627823993

Special Order: No Guaranteed ETA

$ 34.99 USD

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$ 34.99 USD

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Part of the EGR cooling system. Located in the coolant line near the aux water pump.

Meyle Camshaft Position Sensor - E38 E39 E53 M62 (09/1998 and up) ...

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T#:35829319

Part#: 12147539166

Special Order: No Guaranteed ETA

$ 32.99 USD

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$ 32.99 USD

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When this sensor fails, it will become impossible to start your car, leaving you stranded.

Meyle Camshaft Position Sensor - BMW i3

T#:52762526

Part#: 3148100005

Special Order: No Guaranteed ETA

$ 30.99 USD

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$ 30.99 USD

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The MEYLE Camshaft Position Sensor restores the "timing" of your engine, ensuring your fuel is injected at the perfect millisecond.

Coolant Temperature Sensor

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T#:5958757

Part#: 12621747281

Special Order: No Guaranteed ETA

$ 12.99 USD

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$ 12.99 USD

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MEYLE-ORIGINAL: True to OE coolant temperature sensor. Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. Comparable OE Cross Reference - 12621747281 12621710535

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MEYLE Crank Position Sensor - BMW E46, E90

T#:52621846

Part#: MPS0126

Special Order: No Guaranteed ETA

$ 29.99 USD

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$ 29.99 USD

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The Meyle MPS0126 Crankshaft Position Sensor is a robust replacement for aging or failing factory sensors that often trigger P0335 or P0339 trouble codes.

Oil Pressure Switch

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T#:5944185

Part#: 12618611273

Special Order: No Guaranteed ETA

$ 6.99 USD

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$ 6.99 USD

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This Meyle Oil Pressure Switch is the ideal service replacement to keep your BMW or European powerhouse performing reliably on the street or track.

Meyle Outdoor Temperature Sensor / Probe

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T#:579266

Part#: 3009190001

Special Order: No Guaranteed ETA

$ 44.99 USD

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$ 44.99 USD

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Common fix for incorrect OBC temperature readings

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