One problem related to engine failure has been reported for the 1996 Mercury Mystique. The most recently reported issues are listed below.
First engine failure occurred without warning after exiting the freeway, dealership failed to acknowlege engine failure and insisted the problem was the battery. Engine failed again after picking up car from dealership after they had it 3 days. Head gasket was repaired and engined failed again. Ford refuses to take any responsibility.