Genuine OEM Audi fuel tank vent tube, part number 420201163A. This component is essential for the proper venting of the fuel system, ensuring correct pressure regulation and safe vapor management within the fuel tank assembly. It is designed to maintain a secure, leak-free connection between the tank and the ventilation system. Genuine OEM parts are critical for this application to ensure the exact material resistance to fuel vapors and the precise routing geometry required for a perfect fit.