The oil pump strainer under a Citroën 11CV, 15CV, or HY is a crucial component that ensures the filtration of oil within the vehicle's lubrication system. By preventing debris and impurities from building up, this strainer helps the oil pump function efficiently. This contributes to optimal lubrication of the engine components, which is essential for maintaining engine performance and longevity. The strainer is made of high-quality material and designed to fit perfectly and be compatible with these specific Citroën models. Regular maintenance and replacement of this part are vital for reliable operation.