Genuine OEM Audi Engine Coolant Hose, part number 1EA121157R. This critical component is responsible for transferring coolant between various parts of the engine cooling system, helping to maintain optimal engine temperature. It is located in the upper engine area, connecting multiple cooling system components. Weighing 0.711 kg and measuring 0.54 m in length, 0.363 m in width, and 0.12 m in height, this hose features a complex, multi-branch design. Genuine OEM hoses guarantee the correct routing geometry, material resistance to heat, pressure, and coolant chemicals, preventing leaks and ensuring efficient cooling.