Genuine OEM Kia Radiator Lower Hose, part number 25412F2400. This hose is a critical component of the engine cooling system, designed to transport cooled coolant from the radiator back to the engine's water pump. It connects the radiator to the engine's water pump. Using a genuine OEM hose ensures the correct routing geometry, material composition, and pressure resistance for reliable, leak-free performance and long service life.