2011 with 240,00km and the exhaust finally needed replacement. I have been working on cars for 40 yrs and never have I had an exhaust nut completely rot away. Only thing holding the extension pipe to the front flex was rust. 10 minutes later exhaust was completely removed. Had to clean up the threads on the studs and less then an hour job complete. Did Ford use a new material for exhaust nuts that dissolves at the same rate that the exhaust wears out. LOL.