Genuine OEM Audi Fuel Return Hose, part number 4L0201906C. This critical hose is responsible for safely routing excess fuel from the engine back to the fuel tank, helping to regulate fuel system pressure and prevent vapor lock. It is an integral part of the fuel delivery system, connecting various fuel components as shown in the diagram. Constructed from fuel-resistant rubber and reinforced materials, this hose weighs approximately 0.07 kg. Using a genuine OEM fuel return hose ensures correct material compatibility, precise routing, and leak-free operation under varying fuel pressures and temperatures.