Two problems related to engine shut off without warning have been reported for the 2003 Ford Mustang. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Ford Mustang based on all problems reported for the 2003 Mustang.
While slowing down, downshifting or switching gears, the car engine will just fail and shut off/stall without any warning. The car will not "buck" or shake, it will just turn off, causing the power steering to stop operating. I have had two close incidents where I was turning into a parking lot and almost hit a car because the power steering shut off when the engine died without warning. I am afraid this problem will cause a bad accident, especially when I have two young children riding in the vehicle most of the time. I took the car to Ford dealership they stated that they did a full inspection but did not find anything wrong. I am still experiencing the same problem at least several times a day when my engine will just shut off without any warning or notice while I am operating it. Both my husband and my father have driven my car and experienced this problem so I know that it is not the way I am driving it.
Driving down the road about 35 mph and put on the brakes and the car shut off (shutting off the power steering and power brakes). This has happened to me twice. The second time was a couple of days ago I was getting off the interstate and when I applied the brakes the car shut off, I was lucky there was nobody in that intersection. . .