Genuine OEM Hyundai Fuel Filler Cap, part number 310103X000. This cap is designed to securely cover and seal the vehicle's fuel tank opening, preventing fuel evaporation, spillage, and contamination from dirt or debris. It is located at the fuel filler neck. This black plastic cap includes a tether for convenience and measures approximately 0.083m in length. Genuine OEM fuel filler caps ensure a precise, airtight seal to maintain proper fuel system pressure and prevent check engine light issues related to evaporative emissions.