Genuine OEM Audi Engine Coolant Hose, part number 4K0121052C. This essential hose is responsible for circulating engine coolant, playing a vital role in maintaining optimal engine operating temperatures. It connects various components within the cooling system, including the radiator. Weighing 0.205 kg, this hose is engineered for specific routing and resistance to heat and pressure. Genuine OEM hoses ensure correct routing geometry, material durability, and leak-free performance under demanding engine conditions.