Genuine OEM Audi Coolant Hose, part number 1K0122051HR. This essential hose connects components within the engine cooling system, facilitating the circulation of coolant to maintain optimal engine operating temperatures. It features integrated quick-release couplings for secure and efficient installation, and its corrugated design allows for flexibility and vibration absorption. This hose is positioned to connect the radiator to the engine assembly. Weighing approximately 0.55 kg, it is built to withstand engine bay temperatures and pressures. Choosing a genuine OEM coolant hose ensures the correct material flexibility, precise coupling design, and resistance to thermal cycling, which are crucial for preventing leaks and maintaining cooling system integrity.