Genuine OEM Audi Heater Coolant Hose, part number 8K2819371E. This hose is designed to transport engine coolant to the vehicle's heating system, facilitating cabin temperature regulation. It is positioned within the heating and ventilation assembly. Weighing 0.244 kg and measuring approximately 0.45 m in length, this hose is constructed from high-quality, heat-resistant rubber. Choosing a genuine OEM hose ensures precise fitment, correct routing geometry, and resistance to thermal cycling and coolant chemicals, preventing leaks and maintaining system integrity.