Genuine OEM Hyundai Fuel Tank Overflow Hose, part number 31037D3000. This essential hose connects the fuel filler neck assembly to the main fuel tank, playing a crucial role in the fuel system's venting and overflow management during refueling. It ensures proper fuel flow and prevents spillage by directing excess fuel or vapors safely. The hose is integrated within the fuel system, linking the filler components to the tank. Choosing a genuine OEM overflow hose guarantees the correct material resistance to fuel, precise routing geometry, and secure connections, which are vital for maintaining fuel system integrity and preventing leaks or emissions.