Genuine OEM Kia Piston Snap Ring, part number 234132C400. This small but critical component is designed to secure the piston pin within the piston, preventing its axial movement. It is installed in a groove inside the piston bore, retaining the piston pin that connects the piston to the connecting rod. Choosing a genuine OEM snap ring ensures precise dimensions, correct material spring tension, and strength, which are vital for maintaining the integrity of the piston assembly and preventing catastrophic engine failure.