Genuine OEM Audi Temperature Sensor, part number 028919501C. This sensor is crucial for monitoring the operating temperature of the engine, providing vital data to the engine control unit (ECU) for fuel mixture, ignition timing, and cooling fan operation. It is typically installed directly into the engine block or coolant passages. Weighing approximately 0.02 kg, this electrical sensor ensures precise readings. Using a genuine OEM sensor guarantees accurate calibration and signal characteristics, which are essential for reliable engine management and preventing performance issues or overheating.