A retaining clip for the piston pin of a Citroën DS is a crucial small component that helps secure the piston pin within the piston. It prevents unwanted movement or detachment during engine operation, which is vital for smooth performance and engine longevity. The retaining clip ensures a firm connection, even under extreme engine conditions. Specially designed to fit perfectly on the piston pin of the Citroën DS, this part is essential to maintain the integrity and efficiency of the engine of the classic vehicle.