I have a intermittent starting problem with my 2015 Mustang GT. I
depress brake pedal and push start button which is how you start this car. I
get a loud sounding switch noise from underneath the hood and car will not
start. I repeat this procedure, sometimes many times until car starts.
Dealer is of no help. They say they can't duplicate the problem so as far
as they are concerned there is no problem.
Sounds like it may be a bad starter. I would rap on the starter with a heavy metal object like a hammer and at the same time have someone else try starting car. If it starts then you have a bad starter.
Keep hammer away from the starter and go back to the dealer or try another dealership. Also maybe take a video of the issue from under the hood while someone is trying to start the car. Take the video and the car to the dealer. If they are not helpful talk to the service manager and if necessary the general manager. Another thing you could do is to closely inspect the electrical connections at the starter. Connection could be loose.
Keep in mind that intermittent electrical issues are often difficult to diagnose and may be just as frustrating for your dealership service department as they are for you.
Looking for a Used Mustang in your area?
CarGurus has 38,147 nationwide Mustang listings starting at $1,750.
Search Ford Mustang Questions
Ford Mustang Experts