Genuine OEM Audi Exhaust Gas Temperature Sensor, part number 4G0906088AJ. This sensor is an integral component of the exhaust system, responsible for accurately measuring the temperature of exhaust gases. It transmits this data to the engine control unit, enabling precise adjustments to fuel delivery and ignition timing for optimal combustion and reduced emissions. Choosing a genuine OEM sensor ensures accurate readings and long-term reliability, which is vital for maintaining engine performance and compliance with environmental regulations.