Genuine OEM Audi Additional Coolant Hose, part number 4K0145919J. This hose is designed to transport coolant efficiently to and from the additional cooling components, playing a vital role in regulating engine temperature. It is positioned within the engine cooling system, connecting various cooling circuit elements. Weighing approximately 0.511 kg, this hose ensures proper fluid flow and heat dissipation. Choosing a genuine OEM coolant hose guarantees the correct routing geometry, material composition, and resistance to engine fluids and temperatures, preventing leaks and ensuring reliable cooling.