For 1990-2009 cars

1. Check and adjust the tire pressures to the pressures specifications shown on the tire placard, located on the driver's side door lock pillar.
2. Note the load conditions under which the vehicle is normally driven.
3. Ride in the vehicle with the owner in order to be sure you understand the complaint before proceeding to the next step.
4. Test each strut dampener/shock in turn by quickly pushing down, then lifting up, the corner of the bumper nearest the strut dampener/shock being checked. Use the same amount of effort on each test and note the resistance on compression and rebound. Compare this with a similar vehicle having acceptable ride quality. Both strut dampeners/shocks should provide the same feeling of resistance.