Genuine OEM Volkswagen Fuel Tank Cap, part number 3C8201550. This essential component is designed to securely seal the fuel tank opening, preventing fuel evaporation, protecting against contamination, and maintaining the correct pressure within the fuel system. It features an integrated tether to prevent loss during refueling. Constructed from durable, fuel-resistant plastic, it weighs approximately 0.104 kg. Opting for a genuine OEM fuel tank cap ensures a precise, leak-free seal and proper system ventilation, which is critical for fuel efficiency and emissions control.