The front thrust rod bushings—also referred to as tension strut bushings—are known to fail occasionally. The oil-filled rubber mounts weaken and crack over time, causing a mushy road feel and shuddering in the steering wheel when going over bumps. These worn bushings should be replaced.Google+
Car Problem Reports
BMW 535i Front Tension Strut Bushings May Fail
BMW 535i Problem
Visitor, 1990 BMW 535i, 200,800 mi
I had the bushings replaced about 50,0000 miles ago and the drive shaft about a year ago I do a lot of driving overall this car is amazing for it's age!