Genuine OEM Volkswagen Headlight Control Unit, part number 5TA998399. This electronic module is responsible for managing various functions of the vehicle's lighting system, specifically for the left headlight assembly. It ensures correct operation of light intensity, beam patterns, and adaptive features. Weighing approximately 0.213 kg, this unit is a compact electronic component. Choosing a genuine OEM control unit guarantees the correct firmware, sensor calibration, and electrical compatibility, which are crucial for the proper and safe functioning of advanced lighting systems.