Genuine OEM Audi Sun Sensor, part number 3AA907539A. This sensor is precisely engineered to detect the intensity of sunlight entering the cabin, providing vital input for various vehicle functions, including automatic climate control and lighting systems. It is typically mounted on the dashboard, near the windshield. Weighing approximately 0.019 kg, this compact sensor ensures accurate environmental readings. Using a genuine OEM sun sensor guarantees correct calibration and signal characteristics, which are essential for the proper functioning of automated comfort and safety features.