This is a genuine FEBI BILSTEIN oil filler cap, part number 31117. Designed to provide a secure and reliable seal for your vehicle's engine oil reservoir, this cap is essential for preventing oil leaks and protecting the engine from external contaminants. FEBI BILSTEIN is known for its commitment to quality and precision engineering. This oil filler cap is manufactured to meet stringent automotive standards, ensuring a perfect fit and long-lasting performance. Proper installation of this cap will help maintain optimal engine health and prevent potential damage caused by oil loss or dirt ingress. Regular inspection and replacement of your oil filler cap are recommended as part of routine vehicle maintenance. A worn or damaged cap can lead to significant issues, including oil loss, engine overheating, and reduced fuel efficiency. Trust FEBI BILSTEIN for dependable engine components.