Made an appointment to have their diagnostician look at my jeep. They explained to me that there would be a charge for his time which could not be applied to any service work. Ok, I understand that. The technician said that the engine code was showing a misfire in cylinder 6. Said my jeep was too new to either have plugs or coils be responsible and said it was most likely a valve problem. Said I should go to the dealer because that is part of the drive train and should be covered under warranty. Went to the dealer and showed them my paperwork. Bottom line...Firestone did NOT charge me and I had $2200 worth of warranty work done, no charge. That is not the first time Firestone has not charged me for something and shown that kind of integrity and honesty. I highly recommend this facility!!