One problem related to automatic transmission cooler 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.
The rear passenger side door, where my son sits in his booster, stopped closing one afternoon on our way to his soccer game. I used a piece of rope to tie the door across the car to the door opposite until I could get my car into the Ford dealership the next day. I searched the internet and saw an article regarding other 2013 Ford Fiesta's having the same issue. I took my vehicle the next day to the dealership and since I was there I let them know that my car, which only had 15k miles on it, has a problem with acceleration. When I accelerate I hear an airy sound coming from the engine and I lose power so that I accelerate very slowly. This is a huge safety issue when getting onto the highway. I was advised when I picked up the car that the lock was a recall item as was an issue with the cooling system that they fixed. In addition, when they checked for the airy sound they found I have a bad transmission. My service rep said the transmission was on back order for 30 days. That was may 2015. Today is 11/2/2015 and I still do not have the parts to replace my transmission. I have asked several times if I could have a rental car or borrow a car from Ford until my transmission is fixed due to the low acceleration and have been told time and again that they can not "authorize" it.