Genuine OEM Audi Headlight Ventilation Cap, part number 4N0941041A. This small cap is an integral part of the headlight assembly, designed to facilitate proper air circulation. It helps prevent condensation buildup inside the headlight unit, which can impair light output and damage internal components. Weighing only 0.003 kg, this genuine OEM cap ensures a precise fit and the correct ventilation characteristics, crucial for maintaining the clarity and longevity of the headlight system.