Genuine OEM Audi Fuel Return Hose, part number 4L0201906A. This hose plays a critical role in the fuel system by returning excess or unused fuel from the engine back to the fuel tank, helping to regulate fuel pressure. It is located as part of the fuel line assembly, typically underneath the vehicle. Weighing only 0.019 kg, this hose is designed for precise fitment. Choosing a genuine OEM fuel return hose ensures correct material composition for fuel resistance, exact connection points, and leak-free operation vital for safety and system efficiency.