The front lower control arms help to keep the wheels on-track and the suspension planted over bumps and through corners. Over time, the bushes will degrade, causing a loose feeling that can lead to a potentially dangerous scenario. Manufactured as a direct replacement for the original ageing arms, they come complete with bush pre-pressed for easy installation. Of the two control arms that come on the front of the E60/E61 5 Series, this fits in the rearward mounting position with the balljoint facing up. Made by Germany's Febi-Bilstein.