Genuine OEM Audi Upper Radiator Coolant Hose, part number 4F0145925A. This hose is responsible for transporting hot coolant from the engine to the radiator, facilitating the engine cooling process. Made from durable rubber, it is designed to withstand high temperatures and pressures. Weighing 0.25 kg, genuine OEM hoses ensure correct routing geometry, material composition, and resistance to coolant chemicals, preventing leaks and maintaining optimal engine temperature.