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.
Car Problem Reports
BMW 540i Front Tension Strut Bushings May Fail
BMW 540i Problem
Average Mileage: 124,000 mi (95,000 mi - 153,000 mi)