Prob with different diameter tires on Xi
So I find out today that one of my customers had a front tire fail on her 2006 Xi. She'd had two rears replaced a few months ago.
Today, the dealer replaced just the flat one in front, so now she has three slightly different size tires on her car.
I've read Xi's should get all four at the same time...maybe that's overly fanatic, but at least a pair at a time, right?
What's the risk to the diffs and anyway to think of getting dealer to replace the other front one, given that she has tire insurance and that different size front one isn't 'probably' recommended (unless it's by a dealer that'd otherwise 'maybe' have to pay for it)?