Genuine OEM Audi Engine Breather Vent Hose, part number 03F103560A. This hose is a crucial component of the engine's crankcase ventilation system, designed to allow harmful gases and vapours to escape the engine. Proper ventilation is essential for preventing pressure buildup, maintaining oil cleanliness, and ensuring efficient engine operation. Using a genuine OEM breather hose guarantees the correct routing, resistance to oil and high temperatures, and secure connections, preventing vacuum leaks and potential engine issues.