This is a genuine CORTECO oil filler cap, part number 023718P. It is designed to provide a precise fit for compatible vehicles, ensuring a tight seal. A properly functioning oil filler cap is crucial for maintaining the integrity of your engine's lubrication system. It prevents dirt, debris, and moisture from entering the crankcase, which can lead to premature wear and damage. Replacing a worn or missing oil filler cap with this CORTECO part will help maintain optimal engine performance and longevity. Trust CORTECO for reliable sealing solutions.