Genuine OEM Audi Auxiliary Heater Coolant Hose, part number 8R0265370AB. This hose is an integral component of the vehicle's auxiliary heating system, responsible for circulating coolant to facilitate heating functions. It is specifically routed within the auxiliary heater assembly to ensure optimal fluid flow. Constructed from durable, heat-resistant rubber, it measures approximately 0.56m in length. Using a genuine OEM hose guarantees correct routing geometry, material compatibility, and resistance to temperature and pressure fluctuations, preventing leaks and ensuring reliable system operation.