Genuine OEM Volkswagen Headlight Bulb Cap, part number 5C7941607B. This cap serves as a crucial protective cover for the headlight bulb and the internal housing of the headlight assembly. It effectively seals the opening, preventing the ingress of moisture, dust, and debris that could damage the bulb or electrical connections. Made from durable dark plastic, this round cap ensures a precise fit and reliable seal. Using a genuine OEM headlight cap guarantees the correct dimensions and material quality, maintaining the integrity and longevity of your vehicle's lighting system.