Genuine OEM Hyundai Fuel Pump O-Ring, part number 311181R000. This O-ring is designed to create a tight, leak-free seal within the fuel pump assembly, preventing fuel evaporation or leakage. It is made from a fuel-resistant rubber compound. A genuine OEM O-ring ensures the correct material composition and precise dimensions for reliable sealing in the demanding environment of the fuel system, crucial for safety and performance.