Shock and Strut Warning Signs:
Coil springs are part of your vehicle's suspension system. If your vehicle is designed with shocks, the coil springs are mounted between the wheels and the frame of the vehicle. Struts, on the other hand, are essentially a coil spring and shock absorber all in one piece. When you drive over a bump, your car bounces on the coil springs, regardless of whether you have shocks or struts. The shock absorbers in both cases keep your car from bouncing nonstop. So if you drive over a bump or a patch of rough road and your vehicle continues to bounce, it is an indication that you require a shock or strut replacement.