2004 Mercury Grand Marquis Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2004 Mercury Grand Marquis

2004 Mercury Grand Marquis Problems

Intake 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.

Engine 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.

Transmission Failure Common Due to Front Pump Failure

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.

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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

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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