I bought the car used for a commuter vehicle for my wife. After about 5,000 miles I noticed that the rear tires were wearing pretty fast so I purchased a new standard set of upper control arms. I installed the new control arms and rotated the tires only to find in a couple of thousand miles it was doing the same thing. I then purchased a set of adjustable control arms, set the camber to 0 degree's and haven't had a problem since. Come on! Ford and Mazda you can't even get the suspension right on a newly manufactured car. The rear shocks and front struts have junky seals in them too that leak oil and have to be replaced.