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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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MHD DME Unlocker - BMW B48 B58 S58 S63 (Pre-06/20)
MHD DME Unlocker - BMW B48 B58 S58 S63 (Pre-06/20)
MHD Tuning - Corporate Logo
T#:54852023
Part#: MHD-UNLOCKER
Back Ordered
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$ 373.99 USD
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$ 373.99 USD
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MHD Unlocker with a plug and play harness/connections - Simple and easy unlock at home in a few minutes!
Battery Tender Plus Advanced Battery Charging System
Battery Tender Plus Advanced Battery Charging System
Battery Tender - Corporate Logo
T#:49892371
Part#: BTT0210128
Back Ordered
New Item
$ 69.99 USD
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$ 69.99 USD
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Mishimoto Ignition Coil, 8-Pack - BMW N63 & S63 Engines
Mishimoto Ignition Coil, 8-Pack - BMW N63 & S63 Engines
Mishimoto - Corporate Logo
T#:51075067
Part#: MMIG-BMW-1108
Ships in 3 Business Days
New Item
$ 274.99 USD
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$ 274.99 USD
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The Mishimoto Ignition Coil (MMIC-BMW-11B) focuses on durability and electrical precision.
BMW Alternator - SEG Automotive 0121.715.118
BMW Alternator - SEG Automotive 0121.715.118
SEG Automotive - Corporate Logo
T#:54851991
Part#: 12317560985
Ships in 2 Business Days
New Item
$ 1,049.99

This product was last offered at the strikethrough price on
07-16-2026

$ 949.99 USD
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$ 949.99 USD
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MINI Alternator - SEG Automotive 0125.711.078
MINI Alternator - SEG Automotive 0125.711.078
SEG Automotive - Corporate Logo
T#:54851993
Part#: 12317613445
Ships in 2 Business Days
New Item
$ 564.99

This product was last offered at the strikethrough price on
07-16-2026

$ 509.99 USD
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$ 509.99 USD
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Mishimoto Ignition Coil - Single - BMW M54, N20, N52, N54, N55, N62, S54, S62
Mishimoto Ignition Coil - Single - BMW M54, N20, N52, N54, N55, N62, ...
Mishimoto - Corporate Logo
T#:51075090
Part#: MMIG-BMW-02
Ships in 3 Business Days
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$ 72.99 USD
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$ 72.99 USD
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The Mishimoto BMW Ignition Coil is built to handle the intense heat cycles found in BMW’s modern turbocharged and naturally aspirated engines.
Vargas MAP Sensor Extension Harness - BMW B58, N54, N55, S55, S58, S63
Vargas MAP Sensor Extension Harness - BMW B58, N54, N55, S55, S58, S6...
Vargas Turbo Technologies - Corporate Logo
T#:51672717
Part#: VTT-MAP-HARNESS
Ships in 10 Business Days
New Item
$ 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.
BMW Starter - SEG Automotive 0001.108.460
BMW Starter - SEG Automotive 0001.108.460
SEG Automotive - Corporate Logo
T#:55857741
Part#: 12417610344
Ships in 2 Business Days
New Item
$ 368.99

This product was last offered at the strikethrough price on
07-16-2026

$ 330.99 USD
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$ 330.99 USD
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BMW Alternator - SEG Automotive 0124.525.588
BMW Alternator - SEG Automotive 0124.525.588
SEG Automotive - Corporate Logo
T#:54851984
Part#: 12317541694
Ships in 2 Business Days
New Item
$ 521.99

This product was last offered at the strikethrough price on
07-16-2026

$ 468.99 USD
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$ 468.99 USD
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BMW Alternator - SEG Automotive 0124.515.223
BMW Alternator - SEG Automotive 0124.515.223
SEG Automotive - Corporate Logo
T#:54851980
Part#: 12317519618
Ships in 2 Business Days
New Item
$ 503.99

This product was last offered at the strikethrough price on
07-16-2026

$ 453.99 USD
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$ 453.99 USD
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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...
Vargas Turbo Technologies - Corporate Logo
T#:52129729
Part#: VTT56BSENSKIT64
Ships in 10 Business Days
New Item
$ 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.
MINI Alternator - SEG Automotive 0124.325.157
MINI Alternator - SEG Automotive 0124.325.157
SEG Automotive - Corporate Logo
T#:54851988
Part#: 12317550319
Ships in 2 Business Days
New Item
$ 473.99

This product was last offered at the strikethrough price on
07-16-2026

$ 430.99 USD
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$ 430.99 USD
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Vargas Coolant Level Extension Harness - BMW B48/B58/S58
Vargas Coolant Level Extension Harness - BMW B48/B58/S58
Vargas Turbo Technologies - Corporate Logo
T#:51813310
Part#: VTT-FAB-HC
Ships in 10 Business Days
New Item
$ 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 USB To Serial For HPFP Controller - BMW N54
Vargas USB To Serial For HPFP Controller - BMW N54
Vargas Turbo Technologies - Corporate Logo
T#:51778112
Part#: N54-USB-SERIAL-H
Ships in 10 Business Days
New Item
$ 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.
Morimoto Standalone Can-Bus Wiring Harness - H4 / 9003 - Priced Each
Morimoto Standalone Can-Bus Wiring Harness - H4 / 9003 - Priced Each ...
Morimoto - Corporate Logo
T#:54388428
Part#: H240
Ships on Sep 1, 2026
New Item
$ 21.99 USD
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$ 21.99 USD
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