Here it is also necessary to focus on the front suspension shock absorbers on the 3-Series models; MacPherson struts are used here, and they play the role of the part that supports the spring. All the ingredients of strut assembly can be replaced and the best practice is to replace the strut and springs in sets - two at a time. The process for replacing the front strut, upper strut mount, or spring involves two main tasks: the first is the removal of the strut assembly on the car and the second is taken under the workshop where all the components are separated so as to be replaced.