Genuine OEM Volkswagen Crankcase Ventilation Hose, part number 057103772F. This hose is a critical component of the engine's crankcase ventilation system, responsible for evacuating blow-by gases and oil vapors from the crankcase to the intake system or emissions control. It is located on the cylinder block. Constructed from durable, heat-resistant rubber to withstand engine temperatures. Genuine OEM parts ensure the correct internal diameter and material composition for optimal ventilation and emissions control.