2004 Mercury Grand Marquis Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2004 Mercury Grand Marquis
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2004 Mercury Grand Marquis ProblemsEngine May Overheat at Idle With AC On
The engine may overheat at idle when the AC is on. A new, upgraded fan motor and resistor may be required to correct this concern.
The car had 64600 miles on it and the headlights started going out while driving, which can be very dangerous. The problem is in the Light Control Module which is an expensive part (around $500 to $600 + labor).
Transmission problems are common in this model, often as a result of a failed front pump. The pump loses its ability to create hydraulic pressure, which an automatic transmission needs to function. A sign of front pump failure can be a whine type noise.
2004 Mercury Grand Marquis QuestionsI change the blend door actuator it work for a week now stuck on hot again (1 answer)
The actuator you still working because when I run a self-diagnostic check I can see it open and close
I need to replace fuel filter
My headlights were working on and off and I read that there was a recall on the LCM. I was holding in the turn signal lever and the lights would stay on, however the day before I brought the car in to change the LCM the lights did not work at all. I had the LCM changed and the lights still don...
2004 Mercury Grand Marquis RecallsHeadlights Fail To Operate
The lighting control module may fail, resulting in the loss of headlight operation. Dealers will replace the lighting control module free of charge to resolve the concern.