Genuine OEM Audi Coolant Hose, part number 4M0819314J. This hose is designed to transport coolant within the vehicle's heating and cooling system, facilitating heat exchange and temperature regulation. It is located within the complex network of coolant lines, often connecting to the heater core or related components. Constructed from durable, heat-resistant rubber, it measures approximately 0.24 meters in length. Choosing a genuine OEM coolant hose ensures precise fitment, correct routing geometry, and resistance to extreme temperatures and pressures, preventing premature failure and leaks.