The car and engine rattle so much it shakes the cup holder and caused the plastic retention screws to come out on interior trim around the driver's feet. Tune up with new spark plugs and fuel injector treatment did not help at all. Revving the engine was the only fix for the rattle and vibrations while in drive and slow or stopped. There was a recall about rocks getting between the engine and the engine mount, but this car was made after they fixed the issue.