Genuine OEM Audi Engine Coolant Hose, part number 8Y0121101. This hose is responsible for transferring vital engine coolant between various components of the cooling system. It is positioned on the left side of the assembly, connecting to the radiator. Weighing 0.142 kg, it features a specific routing geometry. Using a genuine OEM hose ensures the correct material composition for heat and pressure resistance, preventing leaks and maintaining optimal engine temperature.