Genuine OEM Audi Pressure Difference Sender, part number 057906051G. This sensor is designed to measure differences in pressure across various points in a system, providing critical data to the engine control unit. It is typically found in exhaust gas recirculation (EGR) or diesel particulate filter (DPF) systems. Weighing only 0.043 kg, this compact sensor ensures accurate readings. Genuine OEM sensors provide precise calibration and signal characteristics, essential for correct engine operation and emissions control.