Genuine OEM Audi engine breather hose, part number 07P103474G. This hose is a critical component of the crankcase ventilation system, ensuring proper pressure regulation within the engine assembly. It is located in the upper engine area as shown in the diagram. Genuine OEM hoses are manufactured with specific heat-resistant materials and factory-molded geometry to ensure a secure, leak-free connection and long service life under extreme engine temperatures.