Have an '08 3.0,with 19k. Same issue. I do know that the rear tires (Bridgestones) but not the front ones, have cupped. They are getting noisy. I have had the car aligned twice now. I am skeptical about the solution offered. At 18k miles, I don't think there should be noticeable wear in suspension parts unless you drive over rough roads. I will probably replace the Bridgestones soon, before winter. I'll see what difference that makes.