This is a genuine CORTECO oil filler cap, part number 220127S. It is designed to provide a precise and secure fit for your vehicle's oil filler opening, 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. A secure seal also helps to contain engine oil vapors, contributing to cleaner emissions. CORTECO is known for its high-quality sealing solutions, and this oil filler cap is manufactured to meet stringent industry standards. Replacing a damaged or missing oil filler cap with this genuine part will help maintain your vehicle's performance and longevity.