**Connects the end of the sway bar to the suspension, should be replaced in matched pairs** The sway bar links are an often under appreciated component. However, they are absolutely critical to your BMW's handling in the corners. The sway links attach the end of the sway bar to the suspension and help load the sway bar while preventing excessive body roll. Worn out sway bar links will often cause a "clicking" sound when you travel over bumps in the road at slow speeds. FCP recommends replacing sway bar links in matched pairs only.