general problems of the 2004 Mercury Grand Marquis

Four problems related to service brakes have been reported for the 2004 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Mercury Grand Marquis based on all problems reported for the 2004 Grand Marquis.

1 Service Brakes problem

Failure Date: 07/02/2025

Auto lights stopped working. Tail lights will not come on.

2 Service Brakes problem

Failure Date: 07/17/2015

The contact owns a 2004 Mercury Grand Marquis. While the vehicle was coming to a stop, the contact depressed the brake pedal and the speed and rpms increased without warning. The contact continued to depress the brake pedal; however, the vehicle failed to respond. The contact powered the vehicle off and noticed blue smoke emitting from the rear of the vehicle. The vehicle was taken to the dealer, but the failure was unable to be determined. The vehicle was not repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 58,000.

3 Service Brakes problem

Failure Date: 09/05/2014

The contact owns a 2004 Mercury Grand Marquis. The contact stated that while driving at approximately 5 mph and depressing the brake pedal, the vehicle accelerated. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 162,000.

4 Service Brakes problem

Failure Date: 04/12/2007

The contact owns a 2004 Mercury Grand Marquis. While driving 8 mph the vehicle did not stop when the brake was depressed. He stated that it was approximately 30 seconds before the vehicle stopped. The road conditions were clear. The vehicle was never inspected. Approximately four days later the contact experienced the same problem. He stated that his vehicle crashed into a wooden pole. The vehicle was towed to a mechanic to repair the damage as a result of the crash. The mechanic was unable to diagnose the failure. The current mileage was 36,000.


Other Service Brakes related problems of the 2004 Mercury Grand Marquis

Service Brakes problems
4
Brake Pedal And Linkage problems
3


Grand Marquis Service Bulletins
Grand Marquis Safety Recalls
Grand Marquis Defect Investigations