Genuine OEM Hyundai Engine Main Bearing Bolt, part number 2111425000. This high-strength bolt is a critical fastener designed to secure the engine's main bearings, which support the crankshaft. Its precise dimensions and material properties are essential for maintaining proper crankshaft alignment and preventing engine damage. Using a genuine OEM main bearing bolt ensures it meets the exact torque specifications and fatigue resistance required for reliable engine operation and long service life.