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How TO Diagnose Suspsension Sounds
If audible when driving at low speeds over bumps:
Creaking - Strut mounts of bushings
Clunking, snapping - front lower control-arms
With the car in the air, pry at the lower control arms with a crow-bar. If there is any plays in the ball joints, the lower control arm assembly must be replaced.
Try to shake the tire left and right. There should be no play.
With the car sitting normally, push down on the hood hard enough to let the struts compress. They should come right back up without any bouncing before settling. Bouncing = worn struts or possibly badly damaged control arms (which means other suspension components will likely be worn as well)