One problem related to brake master cylinder 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 a/c system shut down while traveling on an interstate and only blew hot air. The entire a/c system and its components had to be replaced and the vehicle was only two years old. A leak was found under the vehicle as it was parked in a driveway. Upon further inspection, the leak was traced back to the master brake cylinder and brake booster. The master cylinder had to be replaced when the vehicle was only three years old.