Genuine OEM SEAT Speed Sensor, part number 09S927321B. This sensor measures the rotational speed of components within the transmission, providing critical data to the vehicle's control modules. This information is essential for accurate gear shifting, optimal performance, and fuel efficiency. The sensor is typically located within the transmission housing. Genuine OEM sensors are manufactured to exact specifications, ensuring precise signal output and long-term reliability, which is crucial for the complex electronic systems of modern vehicles.