One problem related to alternator/generator/regulator has been reported for the 2011 Ford Fiesta. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Ford Fiesta based on all problems reported for the 2011 Fiesta.
Car sputters to start, then won't engage any gear. Battery won't hold a charge. Today (01 Jan 2013) marks the third incident. The dealer put in a new battery the first 2 times and told me the battery was defective (twice). This car eats batteries. It always happens during cold weather. After the car started, I rolled in neutral out of my driveway onto the street. Then the car would not engage in any gear. I was a sitting duck in the middle of the road. I couldn't go forward or backwards. I had to turn off and restart engine 4 times until it engaged a gear. Then I drove to autozone where they tested the battery. They said the battery was good (1- year old battery had a 3-year warranty) and the alternator engaged, but the battery lost its charge rapidly upon turning off the engine.