Genuine OEM Volkswagen Flexible Connector, part number 06A131127J. This flexible connector is a hose designed to link components within the engine or emissions system, allowing for slight movement and vibration absorption. It is marked as number 4 in the diagram. The specific material and dimensions are engineered to withstand engine temperatures and pressures. Genuine OEM parts are essential for hoses and connectors to ensure correct routing, material integrity, and resistance to degradation, maintaining the integrity of the air intake and emissions systems.