Genuine OEM Kia Radiator Upper Hose, part number 25410D3000. This hose is a vital component of the engine cooling system, responsible for carrying hot coolant from the engine to the radiator for heat dissipation. It is positioned as the upper connection between the engine and the radiator. Using a genuine OEM radiator hose ensures the correct material composition, heat resistance, and precise routing geometry, preventing leaks and ensuring efficient cooling system operation.