Genuine OEM Audi Breather Vent Hose, part number 077103221AM. This component plays a crucial role in the engine's ventilation system, allowing gases to escape and preventing pressure buildup within the crankcase. It is a flexible rubber hose, approximately 0.45 meters in length and weighing about 0.17 kg. Opting for a genuine OEM breather hose ensures the correct material composition, flexibility, and resistance to oil and heat for effective and reliable engine ventilation.