Genuine OEM VAG Ventilation Hose, part number 420201389B. This hose is part of the vehicle's ventilation or emissions control system, designed to transport air or gases between various components. It is positioned within the engine bay or underbody to connect specific modules. Constructed from heat-resistant and fuel-resistant rubber, it ensures durability and leak-free operation. Genuine OEM hoses are manufactured to exact specifications for proper fit and resistance to degradation.