A shock and a strut do the same basic job on a vehicle, damping the movement of the spring and stopping oscillation and bounce. Even though they do the same thing, shocks and struts are completely different parts. Every vehicle was designed with either shocks or struts and your vehicle's suspension cannot be changed to use the other. Strut mounts fix the strut system to the main structure of the vehicle, sometimes the mounts can fail due to wear, causing the strut to break away from the strut mount resulting in a free moving strut which restricts it from dampening energy caused my uneven road surfaces. In order to determine if your vehicle has shocks or struts, refer to your owner’s manual prior to purchasing your replacement part(s). Some important information for selecting the correct strut mounts is the type of strut needed; fitment position, mounting type, suspension type and date limitation of the unit. As car manufacturers regularly update certain peripherals and design of their models, some strut mounts will only be suitable for particular models of certain years.