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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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New Alternator - 140amp | BMW E36 E34 M50 M52 S50 S52
New Alternator - 140amp | BMW E36 E34 M50 M52 S50 S52
Bavarian Autosport - Corporate Logo
T#:25042544
Part#: 12311744567
In Stock
Sale - Save 15% $ 219.99

This product was last offered at the strikethrough price on
05-03-2026

$ 186.99 USD
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Sale - Save 15%
$ 219.99

This product was last offered at the strikethrough price on
05-03-2026

$ 186.99 USD
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New Alternator - 180 Amp
New Alternator - 180 Amp
Bavarian Autosport - Corporate Logo
T#:26438187
Part#: 12317558220
In Stock
Sale - Save 10% $ 294.99

This product was last offered at the strikethrough price on
06-30-2026

$ 265.49 USD
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$ 294.99

This product was last offered at the strikethrough price on
06-30-2026

$ 265.49 USD
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Crankshaft Position Sensor - E36 (OBDI), E34 M50/S50
Crankshaft Position Sensor - E36 (OBDI), E34 M50/S50
Bavarian Autosport - Corporate Logo
T#:579816
Part#: 52380
In Stock
Sale - Save 20% $ 48.99

This product was last offered at the strikethrough price on
05-03-2026

$ 39.19 USD
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$ 48.99

This product was last offered at the strikethrough price on
05-03-2026

$ 39.19 USD
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Common cause of misfires, poor fuel economy, or a crank no start situation. If your M50 or S50 has any of these symptoms, this crankshaft position sensor from Bavarian Autosport is a likely fix.
Burger Motorsport 4 BAR TMAP Sensor & Adapter - BMW N55/N54/S55 (2007-2012 Type A Connector)
Burger Motorsport 4 BAR TMAP Sensor & Adapter - BMW N55/N54/S55 (2007...
Burger Motorsports - Corporate Logo
T#:34885402
Part#: 4BAR TMAP
In Stock
$ 139.99 USD
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$ 139.99 USD
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Use these plug and play adapters to quickly adapt a 4bar TMAP sensor to your N54/N55/S55 BMW, raising the boost maximum boost range from 20psi factory up to 43psi.
Bav Auto Camshaft Position Sensor - BMW E36 E39 Z3 M52 S52
Bav Auto Camshaft Position Sensor - BMW E36 E39 Z3 M52 S52
Bavarian Autosport - Corporate Logo
T#:639841
Part#: 12141703221
In Stock
Sale - Save 20% $ 37.99

This product was last offered at the strikethrough price on
05-03-2026

$ 30.39 USD
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$ 37.99

This product was last offered at the strikethrough price on
05-03-2026

$ 30.39 USD
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Faulty camshaft sensors can lead to a number of issues such as hard starts, stalling at low speeds, and check engine (SES) lights. Restore your BMW's smooth operation and reliability by replacing it with a high-quality camshaft sensor from Bav Auto! From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Alternator - 180amp
Alternator - 180amp
Bavarian Autosport - Corporate Logo
T#:26438185
Part#: 12317837981
In Stock
Sale - Save 15% $ 304.99

This product was last offered at the strikethrough price on
05-03-2026

$ 259.24 USD
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Sale - Save 15%
$ 304.99

This product was last offered at the strikethrough price on
05-03-2026

$ 259.24 USD
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New Alternator - 120A
New Alternator - 120A
Bavarian Autosport - Corporate Logo
T#:25042543
Part#: 12317501690
In Stock
Sale - Save 20% $ 211.99

This product was last offered at the strikethrough price on
05-03-2026

$ 169.59 USD
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Sale - Save 20%
$ 211.99

This product was last offered at the strikethrough price on
05-03-2026

$ 169.59 USD
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Alternator - 120amp
Alternator - 120amp
Bavarian Autosport - Corporate Logo
T#:25042542
Part#: 12317831436
Ships on Sep 29, 2026
Sale - Save 20% $ 222.99

This product was last offered at the strikethrough price on
05-03-2026

$ 178.39 USD
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Sale - Save 20%
$ 222.99

This product was last offered at the strikethrough price on
05-03-2026

$ 178.39 USD
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Bav Auto Camshaft Position Sensor - E38 740i 740iL 750iL
Bav Auto Camshaft Position Sensor - E38 740i 740iL 750iL
Bavarian Autosport - Corporate Logo
T#:639840
Part#: 12141742185
Back Ordered
Sale - Save 15% $ 66.99

This product was last offered at the strikethrough price on
05-03-2026

$ 56.94 USD
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Sale - Save 15%
$ 66.99

This product was last offered at the strikethrough price on
05-03-2026

$ 56.94 USD
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Faulty camshaft sensors can lead to a number of issues such as hard starts, stalling at low speeds, and check engine (SES) lights. Restore your BMW's smooth operation and reliability by replacing it with a high-quality camshaft sensor from Bav Auto! From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Burger Motorsports 2007-2012 TypeA 4BAR Adapter - E82/88 E9X E6X N54 N55 S55
Burger Motorsports 2007-2012 TypeA 4BAR Adapter - E82/88 E9X E6X N54 ...
Burger Motorsports - Corporate Logo
T#:599636
Part#: TYPEA4BARADAPTER
Ships in 2 Business Days
$ 35.00 USD
Free Shipping on orders $49 and up
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$ 35.00 USD
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Use these plug and play adapters to quickly adapt a 4bar TMAP sensor to your N54/N55/S55 BMW, raising the boost maximum boost range from 20psi factory up to 43psi. For very high boost applications, this 4 BAR adapter can be used which requires Bosch 4 BAR sensor (Part # 281002576). SENSOR NOT INCLUDED, Please see T#587716
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Burger Motorsports 2013+ TypeB 4BAR Adapter - F2X F3X N54 N55 S55
Burger Motorsports 2013+ TypeB 4BAR Adapter - F2X F3X N54 N55 S55 ...
Burger Motorsports - Corporate Logo
T#:599637
Part#: TYPEB4BARADAPTER
Back Ordered
$ 35.00 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 35.00 USD
Free Shipping on orders $49 and up
Add to Wish List
Use these plug and play adapters to quickly adapt a 4bar TMAP sensor to your N54/N55/S55 BMW, raising the boost maximum boost range from 20psi factory up to 43psi. For very high boost applications, this 4 BAR adapter can be used which requires Bosch 4 BAR sensor (Part # 281002576). SENSOR NOT INCLUDED, Please see T#587716
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Bav Auto Crankshaft Position Sensor - Multiple BMWs
Bav Auto Crankshaft Position Sensor - Multiple BMWs
Bavarian Autosport - Corporate Logo
T#:639826
Part#: 13627525015
Special Order: No Guaranteed ETA
$ 67.99 USD
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$ 67.99 USD
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This crankshaft position sensor provides the ECU with the engine speed signal. It is mounted in either the engine block or the bell housing of the transmission on most cars. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Bav Auto Intake Air Temperature Sensor - BMW E9X M3 S65
Bav Auto Intake Air Temperature Sensor - BMW E9X M3 S65
Bavarian Autosport - Corporate Logo
T#:639824
Part#: 13627792203
In Stock
$ 24.99

This product was last offered at the strikethrough price on
05-03-2026

$ 19.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
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$ 24.99

This product was last offered at the strikethrough price on
05-03-2026

$ 19.99 USD
Limited Qty Sale
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This sensor provides your BMW's control unit with intake temperature readings in order to run optimally in any condition. If this sensor has failed, your BMW may be suffering from more performance loss than you realize. Replace your IAT sensor to ensure proper temperature readings and restore lost performance! From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Bav Auto Temperature Sensor - BMW E39 E46 E9X E60 F01/02
Bav Auto Temperature Sensor - BMW E39 E46 E9X E60 F01/02
Bavarian Autosport - Corporate Logo
T#:639833
Part#: 13621433076
In Stock
Sale - Save 20% $ 14.99

This product was last offered at the strikethrough price on
05-03-2026

$ 11.99 USD
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Sale - Save 20%
$ 14.99

This product was last offered at the strikethrough price on
05-03-2026

$ 11.99 USD
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This is the coolant temperature sensor used in many BMW models from the late-1990s to the mid-2010s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer. This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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