Strut Assys are complete, integrated assemblies combining a shock absorber, coil spring, and mounting components. Primarily used in MacPherson strut suspension systems on most modern vehicles, they provide damping, support vehicle weight, and maintain wheel alignment. These units feature a pressure-sealed design containing nitrogen gas for consistent performance and are typically sold pre-assembled for simplified installation. Key technical variations include spring rates, damping characteristics, and valving tailored for specific vehicle applications. Replacement necessitates consideration of complete assembly versus component-level servicing due to integrated design.