11 problems related to vehicle speed control have been reported for the 2003 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mercury Grand Marquis based on all problems reported for the 2003 Grand Marquis.
I started Mercury with foot on break like normal. Shifted into reverse. Car accelerated backwards at full speed. Brakes did not stop car. Attempted to shift into neutral but went into drive instead. Car accelerated forward at full speed with my foot still on break. Car hit metal post and tree knocking them down and dragging the tree 50 to 60 feet before stopping with my foot still on the break. Car had stopped accelerating. I turned off the ignition. This unintended acceleration had happened before. Two different dealers attempted to fix the problem. Both of them thought they had been successful but it happened again. Previously, applying the brakes stopped the car, but not this time. Someone could have been injured severely or killed.
Unexpected acceleration when car is stopped at a light, car lunges forward. On one occasion the car was burning rubber . Very dangerous and scary. Have to shut off ignition when this happens. Has occurred several times. My wife refuses to ride in the vehicle.
The contact owns a 2003 Mercury Grand Marquis. The contact stated that while driving 20 mph, the brake pedal was depressed and the engine rpms increased approximately to 4000. The contact stated excessive force was applied ot the brake pedal and the vehicle jerked. The brake pedal was aggressively depressed until the brakes responded and the vehicle was able to come to a stop. The vehicle was taken to the dealer where the failure was unable to be diagnosed. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 130,000.
The contact owns a 2003 Mercury Grand Marquis. The contact stated that while stopped, the engine rpms increased excessively as the vehicle violently accelerated without warning. The contact crashed into another vehicle. There were no injuries and a police report was filed of the incident. The vehicle was taken to a dealer where the failure was unable to be duplicated or diagnosed. The manufacturer was notified of the failure. The vehicle was not repaired. The approximate failure and current mileage was 147,696.
The contact owns a 2003 Mercury Grand Marquis. The contact stated was attempting to park the vehicle while driving 5 mph in a residential driveway when the vehicle abnormally accelerated. The contact crashed into the garage of his home. The brakes were applied during the failure but did not respond. The contact was uninjured yet there was extensive damage to the vehicle. The vehicle had not yet been inspected or repaired. The manufacturer was not notified of the failure. The failure mileage was 50,400.
The contact owns a 2003 Mercury Grand Marquis. While approaching a stop light the vehicle accelerated without intention through an intersection. After repeated brake application the vehicle would not stop. She was able to decelerate by driving onto the side of the road. She was in the process of towing the vehicle to the dealer. The failure mileage was 25,000.
The contact owns a 2003 Mercury Grand Marquis. While waiting to make a right turn with the brake pedal depressed, the vehicle slowly began to move. The contact depressed the brake pedal harder and the engine immediately began to race. The tires began to screech and the vehicle lunged forward uncontrollably into oncoming traffic. He shifted into neutral to turn off the ignition and was five feet into the other lane. No crash occurred. The failure has occurred on four occasions. The contact restarted the vehicle and drove ten miles to his residence. He will have the vehicle towed to the dealer. The failure mileage was 44,500.
The contact owns a 2003 Mercury Grand Marquis. While waiting to turn at a stop sign the engine increased in rpms and accelerated forward. The failure caused the contact's vehicle to crash into the vehicle in front of him. Both vehicles were damaged , and a police report was taken. The vehicle was at the dealer awaiting a diagnostic to determine the cause of failure. The contact was waiting for an insurance estimate and report. The current and failure mileages were 58,000.
While stopped at a traffic light with foot on brake, the vehicle kicked into a fast idle.
After starting and shifting into drive the engine raced and there was unexpected acceleration and the car would not stop even while applying brake. Turned vehicle off after crash and the engine continued to sound like it was running.
When applying pressure to the brake, the accelerator surged.