Genuine OEM Volkswagen Bulb Retaining Ring, part number 1T0941621. This component is designed to securely hold a light bulb in its housing, preventing movement and ensuring proper electrical contact. It typically sits within the headlight or taillight assembly, providing a stable mount for the bulb. Made from durable plastic, it is lightweight at 0.019 kg and measures approximately 6.5 cm in diameter. Choosing a genuine OEM retaining ring guarantees the precise fit and material quality needed to withstand temperature fluctuations and vibrations, ensuring long-term bulb stability and reliable lighting performance.