Common symptoms of a bad suspension include clunking sounds and uneven tire wear. When you are driving, you might feel like the car is leaning to one side or it's just plain bumpy. A bad suspension could also result in a rocking feeling from front to back or side to side.
If you suspect a problem, have the suspension system including shocks, struts, seals, bushings, control arms, springs, and more thoroughly inspected.
Suspension parts can fail from age, environment, or wear. Rubber or plastic seals and bushings can fail from age. Metal parts like control arms can corrode from road salt or salt air exposure. Moving parts like ball joints can fail from high mileage or severe use. Shock absorbers and struts can leak hydraulic oil with age.