One problem related to emission control has been reported for the 2003 Ford Explorer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Ford Explorer based on all problems reported for the 2003 Explorer.
: the contact stated the vehicle experienced a problem with hesitation when the speed was kept constant. The dealership replaced the mass air flow sensor. The hesitation problem continued, the vehicle was returned to the dealership which was unable to duplicate the problem. While backing into the driveway the vehicle suddenly accelerated. Although the brakes were applied the vehicle did not stop. The vehicle hit the contact's home resulting in a neck sprain injury. The acceleration continued until the shifter was moved into drive. The dealership was unable to determine the cause of the acceleration. Also, contact complained that abs light was on and pedal felt stiff. Vehicle ran rough. In addition, removed and installed automatic transmission main control valve body.