Includes Pressed-In Bushing & Ball Joint for Ease of Install **Referred to as a wishbone, includes ball joint and bushing** Control arms are a common replacement item on higher mileage BMW's. In many cases the inner bushing can fail causing excessive suspension play, knocking noises, and alignment problems. Additionally, the integrated ball joint can also wear out causing many of the same issues including noises and suspension play. FCP recommends replacing control arms in matched pairs for the best service life and performance.