Genuine OEM Volkswagen PCV Ventilation Hose, part number 038103493AN. This flexible hose is a key component of the Positive Crankcase Ventilation (PCV) system, responsible for routing crankcase gases back to the intake manifold for re-combustion. This process helps reduce emissions and prevents pressure buildup within the engine. The hose is typically located between the crankcase and the intake system. Made from durable, heat-resistant rubber or plastic, it is designed to withstand engine bay temperatures and chemical exposure. Using a genuine OEM hose ensures correct routing geometry, material integrity, and resistance to oil and fuel vapors, which are vital for maintaining emissions compliance and engine longevity.