Genuine OEM Audi Coolant Hose, part number 05A121059A. This flexible hose is a critical component of the engine cooling system, responsible for circulating coolant between various engine parts to dissipate heat and maintain optimal operating temperatures. Weighing 0.128 kg, it is designed for precise routing and connection. Using a genuine OEM coolant hose ensures correct material composition, heat resistance, and pressure tolerance, preventing leaks and ensuring reliable performance of the cooling system.