Genuine OEM Audi Coolant Hose, part number 5Z0122101J. This shaped hose is a critical component of the engine cooling system, designed to transport coolant between various engine components such as the radiator, engine block, and thermostat housing. It ensures efficient heat dissipation and maintains optimal engine operating temperature. The hose measures approximately 0.332 meters in length and weighs 0.339 kg. Using a genuine OEM coolant hose guarantees the correct routing geometry, material composition for heat and pressure resistance, and secure connections, preventing leaks and ensuring the long-term reliability of the cooling system.