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 ProblemsIntake Manifold May Crack Leaking Coolant Behind the Alternator
The composite (plastic) intake manifold may crack near the thermostat housing and cause a coolant leak. Ford released an updated manifold that was reinforced to prevent a recurrence. No recall was issued for this problem but Ford did extend the warranty to seven years on some models from the date of purchase.
A spring in the seat belt buckle may wear or fail, causing the airbag light on the instrument panel to illuminate. Failed buckles will require replacement.
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).
2004 Mercury Grand Marquis QuestionsHeadlights won't come on. Replaced LCM under warranty. Parking lights and all other lights work. All fuses are good. My mechanic said my headlight switch and Multifunction switch (turn signal lever) are working. He believes there may be a burnt wire? (1 answer)
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...
cel light on code p0108
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.