Genuine OEM Audi Heater Coolant Hose, part number 8R2819374B. This hose is an integral part of the vehicle's heating system, responsible for circulating coolant to the heater core and other related components. Its function is to facilitate the transfer of heat, enabling the system to provide warmth to the cabin. Weighing 0.17 kg and measuring 0.375 m in length, this genuine OEM hose is engineered with precise bends and durable materials, ensuring optimal flow and resistance to thermal cycling for reliable long-term performance.