These cars are so tempermental. Check this out. Had some vibration went and had the tires balanced on a hunter machine. The car was perfect. Then put new rotors (NAPA - the better ones, they are awesome btw), then moved the front tires to the rear and put on new tires in the front. Went to the hunter machine to get balanced, they can't get it right. 3 balances later, I have vibration between 65 and 85. I am going back there on Tuesday so the head mechanic (who is on vaction) can do it. We'll see - thry out the hunter 7000 machine. You can do a search on the net and find a website that will tell you who in your area has this machine, the balance is expensive - good luck