Genuine OEM Audi Exhaust Gas Temperature Sensor, part number 057906088AR. This critical sensor measures the temperature of exhaust gases, providing essential data to the engine control unit for optimal fuel mixture, emissions control, and turbocharger protection. It is typically located in the exhaust system. Weighing 0.102 kg, this sensor is designed for high-temperature environments. Choosing a genuine OEM sensor ensures exact calibration, accurate signal characteristics, and long-term reliability for proper engine operation and emissions compliance.