Genuine OEM Jaguar Crankshaft Position Sensor, part number AJ811224. This vital engine sensor is responsible for monitoring the rotational position and speed of the crankshaft. It provides critical data to the engine control unit (ECU) for precise ignition timing, fuel injection, and overall engine management. Accurate crankshaft position sensing is essential for smooth engine operation, efficient combustion, and reliable starting. Choosing a genuine OEM sensor ensures exact calibration, signal characteristics, and durability, preventing common issues like misfires or starting problems caused by inaccurate readings.