I had a nail in each of two rear tires ( OEM Bridgestone run flats), neither was bad enough to be a problem. One would loose about 5 PSI every 5 weeks. The other created no measurable problem. BMW Dealer would not repair, because they said that tire manufacturer would not stand behind any repair to run flat, and they (the dealer) wer not about to accept any liability for damages etc that might occur due to a failure of the tire after the repair.
Independent tire fitter said they would have no problem repairing the tires....
I ended up buying 4 new Michelin Pilot Super Sports.
Just looking for an excuse to dump the runflats.