Genuine OEM Audi Coolant Hose, part number 3D0122096C. This hose is crucial for transporting engine coolant, facilitating heat exchange within the cooling system. It is positioned as one of the lower connections to the radiator. Constructed from durable, heat-resistant rubber, it ensures a leak-free connection. Choosing a genuine OEM hose guarantees correct routing geometry and resistance to thermal cycling and coolant chemicals.