Genuine OEM Volkswagen Engine Vent Hose, part number 03C103558D. This hose is designed to allow for the controlled release of crankcase gases, preventing pressure buildup and maintaining optimal engine performance. It is located within the engine bay, connecting components of the crankcase ventilation system. Constructed from durable, heat-resistant materials, it ensures long-term reliability. Choosing genuine OEM ensures correct routing geometry, material composition, and resistance to engine fluids and temperatures, critical for emission system integrity.