Genuine OEM Audi Ventilation Hose, part number 079103209AK. This hose is a critical component of the engine's crankcase ventilation system, facilitating the removal of blow-by gases. It is positioned on the engine, connecting various ventilation points. Constructed from durable materials designed to resist heat and oil exposure. Genuine OEM hoses maintain precise dimensions and material properties for leak-free operation and proper ventilation.