Genuine OEM Audi Fuel Filler Neck Insert, part number 8R0809933E. This insert is a crucial component that provides a secure and sealed connection around the fuel filler opening, preventing fuel leaks and ensuring proper system function. It is located within the fuel door assembly, surrounding the fuel filler neck. Weighing 0.094 kg, it measures approximately 0.175m in length. Choosing a genuine OEM insert guarantees precise dimensions for a perfect seal, proper material resistance to fuel, and long-term durability.