The air filter retainer ring for the Citroën 11CV 11D is an essential component that helps secure the air filtration system. This ring ensures that the air filter remains firmly in place, guaranteeing optimal airflow to the engine. Made from durable material, this retainer ring is resistant to high temperatures and wear, contributing to the overall efficiency of the vehicle. It can be easily installed with standard tools, making it ideal for both professionals and DIY enthusiasts. Keep your Citroën in top condition with this reliable replacement part.