Genuine OEM Audi Pressure Differential Sensor, part number 057906051H. This sensor is designed to accurately measure the difference in pressure between two specific points within a system. It plays a critical role in various engine management and emissions control applications. Weighing approximately 0.043 kg, this compact sensor is built for precise operation. Choosing a genuine OEM sensor ensures factory calibration and signal characteristics, vital for reliable system performance and preventing false readings.