 I just spent 10k miles om my new certified Mazda 5 , then I should change all tire of my car as all of them were variable damaged from inward , and when I check this problem with dealer , told me I should change suspension parts of three of 4 wheels , It very strange to find that , if you want to buy this car , put in your mind 1- check alignment every few months 2- change tires every 11k to 13k miles , fix suspension parts yearly 