Genuine OEM Audi Heater Hose, part number 4KE819372B. This hose is an integral part of the vehicle's heating and ventilation system, responsible for circulating hot engine coolant to the heater core. This process enables the transfer of heat to warm the cabin. Made from durable, reinforced rubber, this hose measures approximately 0.08 meters in length. Choosing a genuine OEM heater hose ensures precise fitment, robust resistance to high temperatures and coolant chemicals, and a secure, leak-free connection essential for effective climate control.