This is a genuine CORTECO oil filler cap, part number 023986P. Designed to provide a secure and leak-proof seal for your vehicle's engine oil reservoir. Proper sealing is crucial for maintaining engine health by preventing contaminants from entering the oil system and ensuring that oil does not escape. This cap is manufactured to meet stringent quality standards, guaranteeing a precise fit and durable performance. Replacing a damaged or worn oil filler cap with this CORTECO part will help maintain optimal engine conditions and prevent potential oil loss, contributing to the longevity of your engine.