Genuine OEM Audi Engine Heating Hose, part number 4K0819332M. This hose circulates coolant for the engine heating system, ensuring efficient heat transfer and proper temperature regulation. It is located within the engine's complex cooling and heating circuit. Constructed from durable, heat-resistant rubber, it measures approximately 0.544 meters in length. Choosing a genuine OEM hose ensures the correct routing geometry, material composition, and fluid resistance for long-term reliability and leak-free operation.