Flywheel Reference Sensor / Crank Sensor (CPS) - E23, E24, E28, E30 M3

This part is listed by BMW as BMW part number 12141708619 (12-14-1-708-619) and is described as Flywheel Reference Sensor / Crank Position Sensor -- Used by the ECU for Cylinder ID, Cycles per Second, RPM, and general timing of the engine. 

This sensor was used on E23 7 series 733i/735i (1982-1987), E24 633csi/635csi (1982-6/1987), E28 533i/535i/535is (1982-1988), E24 M6, and E30 M3. 

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