One problem related to manifold/header/muffler/tail pipe has been reported for the 2013 Ford Fiesta. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Ford Fiesta based on all problems reported for the 2013 Fiesta.
In February of 2014 I took my Fiesta in complaining of grinding and rattling noises when taking off from a stop. Both inner and outer input shaft seals were replaced due to a leak as well as the clutch assembly. In July of 2014 at approx. 13,104 miles, my average miles per gallon was dropping as well as the car shuttering on acceleration and turning the vehicle. Again, within five months the clutch assembly was replaced, in may of 2014 a different issue, the check engine light came on. This time diagnosis was the catalyst element failing and the exhaust manifold assembly was replaced. Another issue was I had the green phone icon light flashing on the center display, in which the front display was replaced. I really like the my Fiesta, but I do not feel very comfortable driving it, too much has gone bad in a short period of time. Ford needs to do more in addressing and fixing these issues. Too many Fiesta owners have these issues and this is not a safe vehicle.