Genuine OEM Audi Fuel Return Line, part number 1K0201294J. This critical component of the fuel system is responsible for returning excess fuel from the engine back to the fuel tank. This process helps maintain optimal fuel pressure within the system and prevents fuel overheating. The line is blue, curved, and measures approximately 0.26 meters in length. Choosing a genuine OEM fuel return line guarantees the correct routing geometry, material compatibility with fuel, and secure, leak-free connections, which are essential for the safe and efficient operation of the fuel system.