Wiring Problems of the 2012 Ford Fiesta - carproblemzoo One problem related to wiring has been reported for the 2012 Ford Fiesta. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Ford Fiesta based on all problems reported for the 2012 Fiesta. TrueDelta | 2012 Ford Fiesta electrical Problems 2012 Ford Fiesta Electrical Problems. See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently 2012 Ford Fiesta problems occur, check out our car reliability stats.