Genuine OEM Volkswagen Sun Irradiation Photosensor, part number 5NA907451F. This sensor is designed to detect the intensity of sunlight entering the cabin. It is typically located on the dashboard, near the windshield, and provides crucial input for the automatic climate control system. Weighing only 0.011 kg and measuring 0.04m in length, it is a compact component. Using a genuine OEM sensor ensures accurate readings and proper integration with the vehicle's complex climate control electronics, maintaining optimal cabin comfort.