Genuine OEM Audi Engine Coolant Hose, part number 1K0122157KD. This hose is a vital part of the engine cooling system, responsible for transporting hot coolant between various engine components, such as the engine block, radiator, and heater core. It ensures efficient heat dissipation and maintains optimal engine operating temperatures. Weighing 0.335 kg, this hose features specific routing and often includes heat shielding for protection. Using a genuine OEM coolant hose guarantees the correct material composition, pressure resistance, and precise routing, which are essential for preventing leaks and maintaining the integrity of the cooling system.