Genuine OEM Citroen Engine Oil Drain Plug Gasket, part number 1616854180. This gasket is designed to create a leak-proof seal for the engine oil drain plug, preventing oil loss during operation. It is installed with the drain plug at the bottom of the engine oil pan. Made from durable rubber, this O-ring ensures a reliable and tight fit. Using a genuine OEM gasket ensures the correct material composition and precise dimensions for a perfect seal, crucial for engine integrity.