Genuine OEM Audi Knock Sensor, part number 07K905377K. This crucial engine management sensor is designed to detect abnormal vibrations caused by engine knocking or pre-ignition, which can lead to engine damage. It is typically mounted directly to the engine block to accurately monitor combustion events. Weighing approximately 0.085 kg, this sensor provides precise data to the engine control unit. Opting for a genuine OEM knock sensor ensures accurate signal characteristics and reliable detection, allowing the engine's ECU to make timely adjustments to ignition timing and prevent costly engine repairs.