Genuine OEM Audi Cylinder Head Vent Hose, part number 03C103558L. This hose is designed to allow for the ventilation of gases from the cylinder head, which is essential for proper crankcase pressure regulation and preventing oil contamination. Weighing approximately 0.054 kg, it is a lightweight component. Opting for a genuine OEM hose ensures precise routing, correct material specifications for durability against heat and oil, and optimal integration with the engine's ventilation system.