The small O-ring oil filter for the Citroen DS is a crucial component ensuring a proper seal of the oil filter. This rubber ring prevents engine oil from leaking, thus ensuring the engine operates optimally. Specifically designed for the iconic Citroen DS, it withstands high temperatures and pressure, guaranteeing reliable performance under various driving conditions. Regular replacement of this O-ring can extend the vehicle's lifespan and maintain engine efficiency and performance. This part is essential for any Citroen DS owner.