Pls be advised the Run Flats now come with a 1 year prorated warranty (the details are in the warranty CD that comes with the car) for road hazards. I had a puncture (nail) on my car with 3K miles, and I had to do the dance of the mongoose with the cobra (dealer), who wanted $5-600 for the replacement. Finally he conceded, the problem seems to be that the dealers buy their tires from a local tire wholesaler, and the wholesaler is the only one who can file a claim with the tire mfg for the replacement. Thus there is no profit money for the dealer. I actually had to call Pirelli to get the bite on the cobras head.
Dealer folded, free replacement, they are not called stealers' for no reason.