Genuine OEM Volkswagen Exhaust Gas Temperature Sender, part number 03L906088HK. This sensor is installed in the exhaust system to measure the temperature of the exhaust gases. Accurate temperature readings are crucial for the engine control unit to optimize fuel injection, ignition timing, and emissions control systems. The sender is located in the exhaust stream. Genuine OEM sensors provide the exact calibration and response characteristics required for optimal engine performance and emissions compliance.