Genuine OEM Hyundai Engine Oil Pan Screw, part number 2151638001. This specific fastener is engineered to securely attach the engine oil pan to the engine block, forming a critical seal that prevents oil leaks. Proper torque and a genuine OEM screw are essential for maintaining the integrity of the oil pan gasket and ensuring the engine's lubrication system functions correctly. Using an OEM screw guarantees the correct thread pitch, length, and material strength for a reliable, leak-free connection.