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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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Innovate LC-2 Wideband O2 Controller Kit

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T#:28836410

Part#: 38770

In Stock at Vendor

$ 212.99 USD

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$ 212.99 USD

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Features & Benefits:

Two configurable linear 0-5V analog outputs Ability to calibrate O2 sensors for maximum accuracy Includes LC-2 controller and Bosch wideband O2 sensor Comes with a program cable, manual, and a 10 ft. sensor cable Includes a 1-inch mild steel exhaust bung Innovate MTS serial in/out capability Integrated dual-color status LED (green/red) Patented DirectDigital™ wideband sensor control Positive lock connectors for all connections Real-time display data on screen or with the powerful LogWorks software Range:

AFR (Air-Fuel Ratio) range from 7.4:1 to 22.4:1 (0.5 to 1.5 lambda)

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OMP Battery Cut Off Switch / Kill Switch

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T#:1614

Part#: EA-462

Back Ordered

$ 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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Voltage Regulator

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T#:596879

Part#: 12321350052

Back Ordered

$ 41.99

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

$ 39.71 USD

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$ 39.71 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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Battery Tender Plus Advanced Battery Charging System

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T#:49892371

Part#: BTT0210128

In Stock at Vendor

$ 69.99 USD

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$ 69.99 USD

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Vargas Plug & Play Pre And Post Throttle MAP Sensor Kit - 6B 4W - BMW...

2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:52129729

Part#: VTT56BSENSKIT64

Ships on Nov 16, 2026

$ 209.99 USD

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$ 209.99 USD

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The VTT 6-Bar MAP sensor kit provides the necessary overhead to monitor boost levels with a linear voltage scale that makes software calibration straightforward.

Battery Cable - With Pole

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T#:54388517

Part#: 61129259425

Ships in 2 Business Days

$ 126.99 USD

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$ 126.99 USD

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On the track or on the street, your BMW’s electrical architecture demands absolute consistency. A degraded positive battery cable introduces unwanted resistance, leading to weak starts, alternator strain, and erratic module behavior. When it’s time to replace a compromised factory cable, you don’t need over-hyped marketing—you need a part that fits precisely and restores factory grid integrity.

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Vargas MAP Sensor Extension Harness - BMW B58, N54, N55, S55, S58, S6...

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T#:51672717

Part#: VTT-MAP-HARNESS

Ships on Nov 16, 2026

$ 59.99 USD

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$ 59.99 USD

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As part of the VTT-FAB fabrication line, this extension harness is designed for builders and tuners who need flexibility.

Vargas Coolant Level Extension Harness - BMW B48/B58/S58

2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:51813310

Part#: VTT-FAB-HC

Ships on Nov 16, 2026

$ 49.99 USD

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$ 49.99 USD

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Simplify your next fabrication project with the VTT-FAB series Coolant Extension Harness.

Vargas Turbo Technologies USB To Serial For HPFP Controller - N54-USB...

2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:51778112

Part#: N54-USB-SERIAL-H

Ships on Nov 16, 2026

$ 37.99 USD

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$ 37.99 USD

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Take full control of your N54’s fueling system with the Vargas Turbo Technologies USB to Serial adapter.

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