Genuine OEM Audi Gearbox Speed Sensor, part number 09D927321A. This sensor is responsible for accurately monitoring the rotational speed within the gearbox, supplying essential data to the vehicle's transmission control unit. It is typically located on or near the gearbox housing. Constructed with durable plastic and precise electrical components, it ensures reliable signal output. Using a genuine OEM sensor guarantees correct calibration and signal characteristics, which are vital for smooth gear changes and optimal transmission performance.