Genuine OEM Volkswagen vent tube, part number 8K0201997AK. This tube is a vital component of the fuel tank ventilation system, allowing for proper pressure equalization and vapor management. It is marked as number 7 in the provided assembly diagram. This part is constructed from durable materials resistant to fuel vapors and environmental conditions. Using genuine OEM parts for ventilation systems is critical to ensure correct routing and to prevent blockages or leaks that could otherwise lead to fuel system performance issues or emissions warnings.