Genuine OEM Hyundai Radiator Cap, part number 253301P000. This essential component seals the radiator opening, preventing coolant loss and maintaining the precise pressure required for efficient engine cooling. It is designed to fit securely on the radiator filler neck. The cap is rated for 1.1 bar pressure. Choosing a genuine OEM radiator cap ensures correct pressure calibration and material integrity for reliable, leak-free performance and proper engine temperature regulation.