The control arm bushing insulates the control arm from your car’s frame and cushions the control arm as it moves. If you hear a clunking noise when going over bumps or when turning, or feel your steering wheel wobble, your bushings may need replacement. Cracks in your bushings are the first signs of failure, and outright gaps in the rubber are sure signs for immediate replacement. Be proactive and replace deteriorating bushings before they cause misalignment and other serious suspension issues.