Genuine OEM Volkswagen Speedometer Sensor, part number 01M927321B. This sensor measures the rotational speed of the transmission output shaft to determine vehicle speed. It is located on the transmission assembly. The sensor has dimensions of 0.375 m x 0.045 m x 0.027 m. Genuine OEM speedometer sensors are calibrated to provide precise speed data, crucial for the vehicle's electronic systems and accurate instrumentation.