BMW Camshaft Position Sensor for M57N - Meyle 13627794646Meyle Camshaft Position Sensor for M57N Suits M57N ONLY OE PN 13622247878, 13622249320, 13627794646, 13627796054 Meyle PN 3148000038 Engine Camshaft Position Sensor The engine camshaft position sensor is used to aid the engine ECU in monitoring the position of the engine camshaft. The feedback from this sensor is used for the optimization of the engine ignition timing. This sensor is sometimes referred to as a CMP sensor and is critical for proper