BMW Electrical Sensors, Switches, & Relays

OBDI Conversion Part - Water Temp Sensor Wiring Adaptor

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T#:508

Part#: TEN9989M50

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This product was last offered at the strikethrough price on
06-13-2026

$ 67.49 USD

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This product was last offered at the strikethrough price on
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The TMS Water Temp Sensor Wiring Adaptor is needed when you are upgrading to OBD-I (1992-1995 components) on a 3.2 or 2.8 liter engine. These earlier engines use two separate water temp sensors in the head, one for the ECU and one for the instrument cluster. Most of the 3.2 and some of the 2.8 liter engines do not have two holes drilled in the head for the early water temp sensors. This is due to the fact that the 3.2 and 2.8 engines used a combined water temp sensor. So we designed a easy to use plug and play wiring harness. The benefits are: No cutting and splicing, no trying to fine plugs and pins. We also suggest using TMS "3.2 in a 3.0" Coolant Hose Adapter P/N: TEN9931007 to make your life easier.

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New Alternator - 140amp | BMW E36 E34 M50 M52 S50 S52

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T#:25042544

Part#: 12311744567

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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

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T#:26438187

Part#: 12317558220

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Sale - Save 15% $ 294.99

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

$ 250.74 USD

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06-30-2026

$ 250.74 USD

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Crankshaft Position Sensor - E36 (OBDI), E34 M50/S50

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T#:579816

Part#: 52380

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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.

New Alternator - 120A

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T#:25042543

Part#: 12317501690

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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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Burger Motorsport 4 BAR TMAP Sensor & Adapter - BMW N55/N54/S55 (2007...

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T#:34885402

Part#: 4BAR TMAP

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$ 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

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T#:639841

Part#: 12141703221

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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

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T#:26438185

Part#: 12317837981

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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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$ 304.99

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Rein N52 N54 Alternator Mounting Screw Set - 12310392568 - E9x, E8x, ...

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T#:14795

Part#: 12310392568

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$ 20.99 USD

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BMW Set Of Alu. Screws Generator -
This item fits the following BMW Chassis:
E70 X5,E82,E83 X3,E85,E86,E89 Z4,E90,E92,E93,F10,F25 X3

Fits BMW Engines including:
N51,N52,N52N

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Alternator - 120amp

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T#:25042542

Part#: 12317831436

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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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$ 222.99

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$ 178.39 USD

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Bav Auto Intake Air Temperature Sensor - BMW E9X M3 S65

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T#:639824

Part#: 13627792203

Ships on Jan 28, 2027

Sale - Save 15% $ 24.99

This product was last offered at the strikethrough price on
10-28-2026

$ 21.24 USD

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$ 24.99

This product was last offered at the strikethrough price on
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$ 21.24 USD

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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 Camshaft Position Sensor - E38 740i 740iL 750iL

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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 ...

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T#:599636

Part#: TYPEA4BARADAPTER

Ships in 3 Business Days

$ 35.00 USD

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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 ...

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T#:599637

Part#: TYPEB4BARADAPTER

Back Ordered

$ 35.00 USD

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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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Bav Auto Crankshaft Position Sensor - Multiple BMWs

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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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Oil Pressure Switch (fits most BMWs)

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T#:363

Part#: 12617568480

In Stock

$ 7.99

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

$ 5.39 USD

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$ 5.39 USD

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Having your oil pressure light come on can mean very serious problems. Or it could just be this switch that fails several times over a car's lifespan. By no means should you ignore the warning light but replacing this sensor could be the actual culprit. The other problem with this switch is that oil can leak past its seal. With the oil under a lot of pressure at this point, the oil loss can be a serious concern. It's a simple replacement when doing most oil change work.

This Oil Pressure Switch fits the following BMWs:
1985-1991 E30 318i, 318is, 325e, 325i, M3
1992-1999 E36 318i/is, 325i/is, 328i/is, 323is, M3
1992-1997 E31 840i, 850i
1988-1994 E32 735i, 735iL, 740i, 740iL
1989-1995 E34 525i, 530i, 535i, 540i, M5
1995-2001 E38 740i, 740iL, 750i, 750iL
1996-2002 Z3 Roadster/Coupe 1.9, 2.3, 2.5, 2.8, 3.0, 3.2
1997-2003 E39 525i, 528i, 530i, 540i, M5
1999-2005 E46 323, 325, 328, 330, M3
2000-2003 Z8 roadster
2001-2006 E53 X5 X5 3.0i, X5 4.4i, X5 4.6is, X5 4.8is
2002+ E65/E66 745i, 745li, 750i, 750li, 760i, B7 Alpina
2003+ Z4 Roadster/Coupe Z4 2.5, 3.0, 3.0si
2004+ E60 525i, 530i, 535i, 545i, 550i, M5
2005+ E63/E64 645Ci, 650i, M6
2005+ E83 X3 X3 2.5, X3 3.0
2006+ E90/E92 325, 328, 330, 335
2007+ E70 X5 X5 3.0i, X5 4.8i

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Rein Relay - 61311378297 - E30, E36, E46, E9x, E8x, E28, E34, E39, E6...

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T#:381382

Part#: 61311378297

Ships in 4 Business Days

$ 20.99 USD

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Replacement relay for the typical white-green and orange relays found in your vehicle

120 pc Fuse Assortment

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T#:1809154

Part#: W5368

Ships in 2 Business Days

$ 13.68 USD

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$ 13.68 USD

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A must for any toolbox.

AUTOTECKNIC Dry Carbon Fiber Battery Terminal Cover - G87 M2 ...

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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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Bav Auto Temperature Sensor - BMW E39 E46 E9X E60 F01/02

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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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$ 14.99

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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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Rein Starter Mounting Hardware - 12410392577 - E9x, E8x, E60, E61, F1...

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T#:594380

Part#: 12410392577

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$ 10.99 USD

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$ 10.99 USD

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Modern starter and water pump fasteners are torque-to-yield, meaning they stretch and can only be safely used once. Replace your hardware for peace of mind.

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BMW Electrical Sensors, Switches, & Relays

Sub-Categories

OBDI Conversion Part - Water Temp Sensor Wiring Adaptor

New Alternator - 140amp | BMW E36 E34 M50 M52 S50 S52

New Alternator - 180 Amp

Crankshaft Position Sensor - E36 (OBDI), E34 M50/S50

New Alternator - 120A

Burger Motorsport 4 BAR TMAP Sensor & Adapter - BMW N55/N54/S55 (2007...

Bav Auto Camshaft Position Sensor - BMW E36 E39 Z3 M52 S52

Alternator - 180amp

Rein N52 N54 Alternator Mounting Screw Set - 12310392568 - E9x, E8x, ...

Alternator - 120amp

Bav Auto Intake Air Temperature Sensor - BMW E9X M3 S65

Bav Auto Camshaft Position Sensor - E38 740i 740iL 750iL

Burger Motorsports 2007-2012 TypeA 4BAR Adapter - E82/88 E9X E6X N54 ...

Burger Motorsports 2013+ TypeB 4BAR Adapter - F2X F3X N54 N55 S55 ...

Bav Auto Crankshaft Position Sensor - Multiple BMWs

Oil Pressure Switch (fits most BMWs)

Rein Relay - 61311378297 - E30, E36, E46, E9x, E8x, E28, E34, E39, E6...

120 pc Fuse Assortment

AUTOTECKNIC Dry Carbon Fiber Battery Terminal Cover - G87 M2 ...

Bav Auto Temperature Sensor - BMW E39 E46 E9X E60 F01/02

Rein Starter Mounting Hardware - 12410392577 - E9x, E8x, E60, E61, F1...

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