Our Expedition shut off one day backing out of driveway. We took it to our local Ford dealer and had it looked at. We have done all of the manufacturer recommended maintenance. They gave it back to us and said it was in excellent condition with no problems. They said it was a fluke. 2 days later the engine completely locked up and is now trash. No dash lights or warnings of any kind. It literally locked up and shut off while driving. I called Ford cooperate and they said tough. I have filed a claim with the NTSB as this is a major safety concern. Buyer beware.