This is a genuine CORTECO oil filler cap, part number 220116S. It is designed to provide a reliable and secure seal for your vehicle's oil filler opening. 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. Crafted with durable materials, this CORTECO cap is built to withstand the harsh conditions under the hood, ensuring long-lasting performance and peace of mind. Replacing a worn or damaged oil filler cap is a simple yet important maintenance task.