This is a genuine CORTECO oil filler cap, part number 220110S. It is designed to provide a secure and leak-proof seal for your vehicle's engine oil reservoir. Properly sealing the oil filler cap is crucial for maintaining engine health. It prevents dirt, debris, and moisture from entering the engine oil, which can lead to premature wear and damage. A faulty or missing cap can also result in oil leaks, leading to low oil levels and potential engine overheating. CORTECO is known for producing high-quality sealing solutions, and this oil filler cap is no exception. It is manufactured to meet or exceed original equipment specifications, ensuring a perfect fit and reliable performance. Replacing a worn or damaged oil filler cap with this CORTECO part will help maintain your engine's integrity and prevent costly repairs.