Genuine OEM Audi Engine Crankshaft Position Sensor, part number 079907601B. This critical sensor monitors the rotational speed and precise position of the engine's crankshaft, providing essential data to the engine control unit for ignition timing and fuel injection. It is a compact unit, weighing approximately 0.039 kg. Using a genuine OEM sensor ensures accurate signal characteristics and reliable performance, which is vital for maintaining engine efficiency and preventing misfires.