Genuine OEM Audi Fuel Return Line, part number 057130297AE. This critical component is responsible for returning excess fuel from the engine's fuel rail or injectors back to the fuel tank, helping to maintain correct fuel pressure and prevent vapor lock. It is positioned within the engine's fuel delivery system. Measuring approximately 0.22 meters in length, this line is constructed from materials resistant to fuel and engine heat. Using a genuine OEM fuel return line ensures leak-free operation, proper fuel flow, and long-term reliability of the fuel system.