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    Genuine BMW Intake Camshaft Sensor - E46 M3, MZ3, Z4 M

    Part #: 12147539171 (12-14-7-539-171)

    Sensor for: Intake. A common failure - On the S54 engine in the E46 M3, M Roadster, and Z4M, there is one sensor for each cam. The sensor tells the computer the position of the cam on cylinder #1. The computer relies on the sensor's information to set injection timing and VANOS control. When a sensor goes bad, the computer loses track of what position the cam is in. While the engine will continue to run (taking its measurements from the crank position sensor), the entire system is thrown off. The engine may stumble or run rough, but not misfire, and there will be a loss of performance.

    Each cam sensor also doubles as a sensor for the VANOS. So when the sensor goes bad, the VANOS will revert to a safe mode and will not advance.

    While the engine will still run with a faulty cam position sensor, it's not running in its finest tune. The DME will have fault codes related to the cam sensor or for the VANOS. This is the Original BMW sensor with a new o-ring.

    Applications:
    2001-2006 E46 M3, M3 CSL
    2006-current E85 Z4 M Roadster, E86 Z4 M Coupe
    2001-2002 MZ3 M Roadster, M Coupe (S54 engine only)


    Shipping Dimensions: 12 X 4 X 4
    Shipping Weight: 0.40

    Price: $140.95 (USD) 
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