Genuine OEM Audi Coolant Hose, part number 4KE121086F. This hose is a vital part of the vehicle's thermal management system, designed to transfer coolant to regulate the temperature of specific components. Proper coolant circulation is essential for preventing overheating and ensuring the longevity and efficiency of the system. Weighing approximately 0.233 kg and measuring 0.505 meters in length, it is engineered for precise routing and secure connections. Using a genuine OEM coolant hose guarantees the correct material composition, flexibility, and resistance to temperature and pressure, preventing leaks and maintaining the integrity of the cooling circuit.