Genuine OEM Audi Coolant Hose, part number 6C0121063. This precisely shaped hose is a vital component of the engine cooling system, responsible for transporting coolant between various engine components. Its specific routing and material composition are critical for maintaining proper engine operating temperatures and preventing overheating. Measuring 0.25m in length and weighing 0.12 kg, it is engineered for durability and resistance to temperature extremes and pressure. Using a genuine OEM coolant hose ensures correct routing geometry, proper fluid resistance, and a leak-free connection for reliable cooling system performance.