To get the most out of your new suspension setup, it's recommended that you replace all parts that are known to fail. Not only will this make your new setup more effective, it will provide a better ride, proper tire position, and make all of your parts last longer.
One often overlooked piece is the upper strut bearing. This is the top mount for your struts and provides a solid platform for your front suspension. If worn, the bearings within this mount make noise, there is slop from worn rubber, and it can shorten the life of your shocks.
These replacements from Genuine BMW is the perfect solution for worn mounts/bearings. Because they are factory OE parts, they fit perfectly in the mounting location and are the proper length and have the correct inside diameter for your struts. A small addition to any front suspension overhaul that can make a huge difference in overall ride quality.