My 2012 car was still in the free service period so I took it to the dealer on a Monday when the low tire indicator came on. They checked it, couldn't find a leak, but added nitrogen. On Friday the same problem came up. I went back, they checked all 4 tires, found no leaks but added nitrogen. Sunday morning it was very flat. On Monday, with the small spare on, I took it to Peoria Tire on Knoxville. Mike Rieker and the workmen there found a small piece of metal, removed it, patched the tire, and filled it with nitrogen. They were fast, efficient, and $10 less than my dealer told me they charge for a patch. Good people; good place. MC