Genuine OEM Audi Coolant Hose, part number 8K0121055AE. This hose is crucial for transporting coolant between components within the engine cooling system, ensuring proper temperature regulation. It is typically located as a lower hose, connecting to the radiator. Weighing approximately 0.327 kg with a length of 0.43 meters, this hose is designed for precise fitment. Choosing a genuine OEM coolant hose ensures correct routing geometry, optimal material resistance to high temperatures and pressures, and long-term durability against coolant degradation.