One problem related to ignition switch has been reported for the 2015 Ford Mustang. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Ford Mustang based on all problems reported for the 2015 Mustang.
The push button ignition switch is located directly under the radio control buttons. The ignition button will shut the car off while in gear and in motion. This happened while I was in a parking lot, going about 5 mph. My husband accidently pushed the ignition button instead of the radio control button and shut the car off. Ford has no solution to this hazardous design flaw, and told me they can't re-engineer the vehicle to eliminate the risk of a serious accident.