2004 Mercury Grand Marquis Repair and Maintenance Costs

A guide to repairs, service, and maintenance costs for your 2004 Mercury Grand Marquis

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2004 Mercury Grand Marquis Problems

Malfunctioning Headlights

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).

Coolant Leak and/or Engine Overheating Due to Cracked Intake Manifold

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.

Airbag Light Due to Failed Spring in Seat Belt Buckle

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.

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2004 Mercury Grand Marquis Questions

I 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

Where is the fuel filter located (1 answer)

I need to replace fuel filter

Headlights 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&#3...

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2004 Mercury Grand Marquis Recalls

Headlights 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.

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2004 Mercury Grand Marquis Reviews

based on 5 customer reviews
I got this car 4/2005 @ 25000 mi. driven mostly on highway, performance was excellent. 17-19/city;25+hwy. love my land boat. I've replaced cat conver.& hdlight module. other than that normal maint. I'm having problems with rear brakes sticking, having that looked at now. 126000 and climbing!!!
I bought a 2004 with only 23,400 miles on. I have put on 10,000 miles and have had to replace the air ride pump at over $ 600.00. Now the power steering is no working. I have owned a number of Grand Marquis and had put many into fleet service for salesmen. I cannot believe that the Mercury Division has not stood up and recalled these vehicles to make them safe. In addition the bottom of the doo...
Over all it's been a god car, I've had two issues that I believe shouldn't have been & that is in the older cars if the upper ball joints went bad in either side you removed & installed what ever side needed to be repaired, not on my 2004 Mercury Grand Marquis, yo have to replace the whole upper assembly on account that the ball joint it comes welded to the upper arm, not only is it very expens...

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