One problem related to other fuel system tank mounting has been reported for the 2013 Ford Fusion. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Ford Fusion based on all problems reported for the 2013 Fusion.
When filling fuel tank, the pump "kicked off" prior to a full tank as displayed by digital fuel gauge (just under full). I drove 25 miles and fuel gauge then showed between full and 3/4 tank. There seems to be an inaccuracy with the calibration of the gauge and/or amount of fuel that can be put into tank, with respect to tank capacity, before pump "kick off".