Genuine OEM Audi Cylinder Head Vent Hose, part number 06B103221H. This hose is crucial for ventilating gases from the cylinder head, preventing pressure buildup and ensuring efficient engine operation. It is typically located within the engine's crankcase ventilation system. Crafted from durable rubber, this hose is designed for precise fitment and long-term resistance to engine heat and oil. Using a genuine OEM hose ensures correct routing, material integrity, and optimal performance of the engine's ventilation system.