How do you know your sway bars bad?

You can tell if your sway bars are bad by noticing increased body roll during turns, clunking or rattling noises when driving over bumps, and a generally unstable or unpredictable ride. Additionally, if your vehicle feels like it's leaning excessively in corners or if the suspension seems overly stiff, these can be signs of worn or damaged sway bar components. A visual inspection may also reveal broken or worn bushings and links.