Genuine OEM Audi Coolant Hose, part number 8K0121030K. This flexible hose is an essential part of the engine cooling system, designed to transport coolant efficiently between various engine components. Measuring approximately 0.38 meters in length and weighing 0.293 kg, it is engineered to withstand high temperatures and pressures. Using a genuine OEM coolant hose ensures the correct material composition, routing geometry, and resistance to thermal cycling, which are crucial for preventing leaks, maintaining optimal engine temperature, and ensuring the longevity of the cooling system.