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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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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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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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BMW Electrical Sensors, Switches, & Relays

BMW B58 3.0L Oxygen Sensor - Downstream

Walker MAP Sensor - BMW N20 N26 S55 S63

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