This is a genuine VICTOR REINZ oil filler cap, part number 71-39631-00. It is designed to provide a secure and leak-free seal for your engine's oil filler opening. Proper sealing is crucial for maintaining oil levels and preventing contaminants from entering the engine. This cap is manufactured to meet the high standards expected from VICTOR REINZ, ensuring durability and a precise fit. Replacing a worn or damaged oil filler cap can help prevent oil loss and potential engine damage. Trust in the quality of VICTOR REINZ for your vehicle's maintenance needs.