Genuine OEM Hyundai Diesel Fuel Filler Cap, part number 31010M6900. This cap provides a secure seal for the vehicle's fuel tank, preventing fuel evaporation, contamination, and spills. It is clearly marked with 'DIESEL' to prevent misfuelling and includes an integrated tether to prevent loss. Constructed from durable, fuel-resistant plastic, it ensures a tight seal and long-lasting performance. Choosing a genuine OEM fuel filler cap guarantees proper sealing, material compatibility with fuel, and a precise fit, which is crucial for maintaining fuel system integrity and preventing emissions.