BMW Electrical Sensors, Switches, & Relays for BMW 3 Series E46 (1999-2005)

Clear BMW chassis

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 - 120A

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:25042543

Part#: 12317501690

In Stock

Sale - Save 20% $ 211.99

This product was last offered at the strikethrough price on
11-07-2026

$ 169.59 USD

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Qty

Sale - Save 20%

$ 211.99

This product was last offered at the strikethrough price on
11-07-2026

$ 169.59 USD

Add to Wish List

Alternator - 120amp

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:25042542

Part#: 12317831436

In Stock

Sale - Save 25% $ 222.99

This product was last offered at the strikethrough price on
11-07-2026

$ 167.24 USD

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Qty

Sale - Save 25%

$ 222.99

This product was last offered at the strikethrough price on
11-07-2026

$ 167.24 USD

Add to Wish List

Innovate LC-2 Wideband O2 Controller Kit

T#:28836410

Part#: 38770

In Stock at Vendor

$ 247.99 USD

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$ 247.99 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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AAF Jump Post Relocation Bracket - E46

T#:7608844

Part#: 11648

In Stock at Vendor

$ 28.99 USD

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$ 28.99 USD

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Since 2010, Advanced Auto Fabrication has been producing and developing both parts and full fledged race cars. Their knowledge base covers a wide range of vehicles both domestic and imported. In the specific case of BMW, the team at AAF has a particular affinity for building and designing components for BMW race cars. The AAF E46 Jump Post Relocation Bracket makes it easy to adjust camber/caster on your race car by getting the factory jump post out of the way! In race car applications, the desired camber and caster settings can cause the strut tops and shock adjusters to interfere with the factory jump post. This kit takes just a few minutes to install and makes using strut braces and adjusting camber plates just that much safer and faster.

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