Genuine OEM Audi Tire Pressure Sensor, part number 4D0907275E. This electronic sensor is responsible for accurately monitoring the air pressure inside a vehicle's tires, transmitting data to the onboard system for safety and optimal performance. It is typically mounted inside the wheel, often integrated with the valve stem. Encased in a durable, lightweight plastic housing, it measures 0.08m in length and weighs 0.029 kg. Using a genuine OEM sensor ensures precise calibration, reliable signal transmission, and compatibility with the vehicle's TPMS, critical for maintaining correct tire pressure and driving safety.