Genuine OEM Audi Fuel Filler Neck Housing, part number 4L0809999A. This component provides a protective enclosure for the fuel filler neck and often serves as a mounting point for the fuel door assembly. It is located on the vehicle's exterior body, typically near the rear quarter panel. Made from durable black plastic, this genuine OEM housing ensures a precise fit and robust protection for the fuel system components, maintaining the vehicle's aesthetic and functional integrity.