The Citroën HY/DS oil filler cap is an essential component for sealing the oil reservoir. Made from high-quality, durable metal, this cap prevents oil leaks and keeps engine oil clean and in the correct location. Its specific design perfectly matches the classic lines of the Citroën HY and DS, ensuring seamless integration with the engine. Easy to install and remove for regular maintenance. It not only provides functional protection against leaks but also maintains the original aesthetics of these vehicle models. A must-have for classic car enthusiasts.