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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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Voltage Regulator
Voltage Regulator
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Beru - Corporate Logo
T#:596879
Part#: 12321350052
Back Ordered
$ 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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Battery Tender Plus Advanced Battery Charging System
Battery Tender Plus Advanced Battery Charging System
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Battery Tender - Corporate Logo
T#:49892371
Part#: BTT0210128
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$ 69.99 USD
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$ 69.99 USD
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AUTOTECKNIC Dry Carbon Fiber Battery Terminal Cover - G87 M2
AUTOTECKNIC Dry Carbon Fiber Battery Terminal Cover - G87 M2 ...
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AUTOTECKNIC - Corporate Logo
T#:21012623
Part#: ATK-BM-0420-G87
Ships in 8 Business Days
$ 495.00 USD
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$ 495.00 USD
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The boldly styled G87 already touts carbon features but carbon fiber is not very often displayed in the engine bay. If you are looking to give your engine bay some carbon spark, AUTOTECKNIC introduces you to their dry carbon battery terminal cover to beautify your engine bay and bring a smile to your face every time you open the hood of your S58 monster! Made from high-quality carbon, this product is sure to stand the test of time!
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Vargas Plug & Play Pre And Post Throttle MAP Sensor Kit - 6B 4W - BMW B58/S55/S58
Vargas Plug & Play Pre And Post Throttle MAP Sensor Kit - 6B 4W - BMW...
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Vargas Turbo Technologies - Corporate Logo
T#:52129729
Part#: VTT56BSENSKIT64
Ships on Jul 15, 2026
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$ 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.
Vargas USB To Serial For HPFP Controller - BMW N54
Vargas USB To Serial For HPFP Controller - BMW N54
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Vargas Turbo Technologies - Corporate Logo
T#:51778112
Part#: N54-USB-SERIAL-H
Ships on Jul 15, 2026
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$ 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.
Vargas MAP Sensor Extension Harness - BMW B58, N54, N55, S55, S58, S63
Vargas MAP Sensor Extension Harness - BMW B58, N54, N55, S55, S58, S6...
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Vargas Turbo Technologies - Corporate Logo
T#:51672717
Part#: VTT-MAP-HARNESS
Ships on Jul 15, 2026
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$ 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
Vargas Coolant Level Extension Harness - BMW B48/B58/S58
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Vargas Turbo Technologies - Corporate Logo
T#:51813310
Part#: VTT-FAB-HC
Ships on Jul 15, 2026
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$ 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.
High Performance AGM Battery Optima REDTOP - 35
High Performance AGM Battery Optima REDTOP - 35
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Optima - Corporate Logo
T#:26238452
Part#: OPT-35
Ships in 10 Business Days
$ 332.99 USD
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$ 332.99 USD
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Elevate your Mini's performance with the REDTOP High-Performance AGM Battery, the ultimate starting battery designed to ensure a reliable ignition every time. Engineered for strong starting bursts, this battery offers high-power delivery and extreme resistance to common causes of battery failure. Enjoy key benefits including up to 3X longer life, 15 times more vibration resistance, virtually spill-proof design, and mountability in any position. With maintenance-free operation and faster recharging, this battery provides optimal starting power for your Mini.

  • Strongest starting burst for reliable ignition
  • Up to 3X longer life for extended durability
  • 15 times more vibration resistance for enhanced reliability
  • Virtually spill-proof design for peace of mind
  • Mountable in virtually any position for convenience
  • Maintenance-free operation for hassle-free use
  • Faster recharging for minimal downtime
  • Optimal starting power for your Mini

Specs:

  • Weight: 31.7 lbs
  • Reserve Capacity: 44 Ah
  • Post Type: SAE Post
  • CCA: 720 Amp
  • Width: 6.75 in
  • Length: 9.38 in
  • Height: 7.69 in
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