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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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Genuine BMW Pulse Generator/Crankshaft Position Sensor - 12141726065 - E36,E36 M3
Genuine BMW - Corporate Logo
T#:185064
Part#: 12141726065
In Stock
$184.95
Free Shipping on orders $49 and up
$184.95
Free Shipping on orders $49 and up

The Crankshaft Position Sensor measures the speed and position of the crankshaft to determine the proper fuel and timing requirement for the best performance.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

Genuine BMW Pulse Generator
This item fits the following BMW Chassis:
E36 M3,E36

Fits BMW Engines including:
M50,S50

 

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Large HD Polyurethane Alternator Bushings - Set of 4
Turner Motorsport - Corporate Logo
T#:359471
Part#: TMS3458KT
Back Ordered, No ETA
Sale - Save 20% $29.95
$23.96
Free Shipping on orders $49 and up
Sale - Save 20% $29.95
$23.96
Free Shipping on orders $49 and up

Trouble trying to get your alternator tensioned or aligned properly? This is a common issue due to the rubber bushings wearing with age or degrading from exposure to the elements, oil, or other contaminants.

Restore proper alignment and tensioning function to your alternator with these Heavy Duty Alternator Polyurethane Bushings.

These will resist pressure and any possible contaminants for much longer than stock rubber bushings, making these a likely one time solution to your alternator issues!

Replaces BMW part # 12311268433. Most cars require four.

This item fits the following BMWs:
1977-1983 E21 BMW 320i
1984-1988 E30 BMW 318i 325e 325es
1988-1991 E30 BMW M3
1976-1981 E12 BMW 528i 530i
1982-1988 E28 BMW 528e 533i 535i M5
1982-1989 E24 BMW 633csi 635csi M6
1981-1987 E23 BMW 733i 735i

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Turner Alpha-N IAT Sensor Relocation Kit - S54 S62 S85
Turner Motorsport - Corporate Logo
T#:597496
Part#: 014579TMSKT
Back Ordered, No ETA
Sale - Save 25% $91.80
$68.85
Free Shipping
Sale - Save 25% $91.80
$68.85
Free Shipping

Turner Plug-and-Play IAT Relocation Kit
Turner Motorsport - Corporate Logo
T#:391751
Part#: 014579TMS
Back Ordered, No ETA
Sale - Save 21% $117.90
Starting at $93.16
Free Shipping
Sale - Save 21% $117.90
Starting at $93.16
Free Shipping

All vehicles will lose some degree of performance due to heat soak under the right operating conditions.  Engine management systems constantly monitor operating conditions and modifying parameters based on sensor inputs. BMW integrated the intake air temp sensor in the MAF housing on models such as the E39 M5, and, being sandwiched behind a hot radiator and in some applications next to an even hotter valve cover, this is less than ideal for performance applications. Absorbing excess heat from its surroundings, the MAF can’t shed it fast enough, and the ECU reads an inaccurately high intake air temperature. Compensating for this false hot air measurement, the ECU pulls timing and runs a richer fuel mixture, resulting in a significant loss of torque.

What can you do?  Locate an intake air temp sensor in a location where it can properly measure incoming air temps and where it's less prone to heat soak. Mounting the sensor further away from the heat source and isolating it from the MAF housing, it can both resist the effects of heat soak longer and respond to temperature changes more quickly.  The result is you’ll experience reduced torque loss and more consistent power output when you’re pushing your engine hard. 

The Turner engineering team was initially skeptical of the claimed performance benefits of this modification. They first set out validate the functionality and performance benefit of a temp sensor relocation. Replicating stop-and-go traffic heat soak in a 2001 540i was a simple task in a controlled environment - their dynometer. First the car was heat soaked to simulate being stuck in traffic or moving at low speeds by running the car four times on the dyno with the dyno's cooling fans disabled. The fans were then turned on for three more runs to observe the recovery rate once air flow was reintroduced. The test: following this procedure once with a stock IAT, and once with their relocation kit in place. 

The result? Turner recovered 11lb-ft torque at 2500rpm through use of their relocation kit, with even greater recovery to be found for M5 owners. Here are the heat soak-related torque losses Turner experienced:

Stock IAT location:
18rwtq at 2500rpm
10rwtq at 3000rpm
9rwtq at 3700rpm

Turner IAT Relocation:
7rwtq at 2500rpm
5rwtq at 3000rpm
5rwtq at 3700rpm

**Click here for installation instructions**

The Turner engineering team designed a complete plug and play kit (unlike all other options on the market) that makes for quick, easy, and reversible installation. Weather-sealed connectors keep out the elements, while sheathed wiring offers a clean appearance underhood. With a harness nearly 3 feet long - the Turner IAT relocation kit offers flexibility in positioning, but not too long that you're left with unsightly excess wiring. Turner recommends positioning the sensor in a location away from engine heat, but still within the intake ducting to achieve accurate intake temp readings - such as the far side of the base of the airbox. Vehicles with cold air intakes with cone-style filters can even position the sensor in the end of the filter. Simply drill a hole in your (cool) location of choice and plug in the harness. More information including installation instructions and some good examples of sensor mounting locations can be found in our DIY PDF. 

We include everything you need to relocate your IAT, just select your desired sensor brand below - Genuine BMW or original equipment Beru.

Also the perfect plug-n-play option for anyone looking to upgrade their intake to utilize an Alpha-N tune!

Note for vehicles with M62 engine: applicable to 1999 and up