Genuine OEM Audi Coolant Hose, part number 4KL122109C. This hose transports coolant within the engine cooling system, ensuring efficient heat transfer and maintaining optimal engine operating temperatures. It is positioned within a complex network of cooling lines. Weighing approximately 0.125 kg, this hose is designed to withstand the high temperatures and pressures of the cooling system. Using a genuine OEM hose ensures correct routing, material integrity, and leak-free performance, critical for the longevity of the cooling system.