Mercury Grand Marquis Repair and Maintenance

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

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Mercury Grand Marquis Problems

Police/fleet/natural gas models may experience lower ball joint wear
Certain police, fleet, and natural gas models may experience lower ball joint wear, requiring replacement in the front. This was a safety recall.
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).

Engine Stalling and/or Hesitation on Acceleration due to Faulty Idle Air Bypass Valve

If you experience difficulty starting the engine when cold, stalling at idle, or hesitations during acceleration, it may be the idle air bypass valve. This valve helps the vehicle idle steady when the accelerator pedal is not pressed.

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Mercury Grand Marquis Questions

AC blows hot air when turned on, but compressor is working. (1 answer)

The AC has been working without any problems until late a last week. It started to blow hot air instead of cold. I checked the compressor, and it's cycling just like it's suppose to. The lines are getting cold but no cold air. Was told that it's a switch under the dash and that the sw...

car died while running will not crank all electrical works battery good new alt (1 answer)

lights and gauges work clicking in relay box one of the relays feels hot

My 06 mercury grand marquis gear shifter is stuck in Park won't budge (1 answer)

I've heard this can be the break light switch ?

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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.

Potential Loss of Steering

Certain vehicles are being recalled because the upper intermediate steering shaft could separate resulting in loss of steering control. This recall includes models previously recalled under campaign #13V-385, these vehicles may have been incorrectly repaired. Dealers will inspect and replace the upper immediate shaft if necessary. If the steering column lower bearing has separated, a retainer clip will be installed.

Potential Loss of Steering

The intermediate shafts connect the steering column to the steering gear. Vehicles in areas where salt is used to de-ice the roads are being recalled because severe corrosion can damage the lower intermediate steering shaft. This can cause the upper intermediate shaft to collapse and separate at the lower steering column bearing. Separation will result in complete loss of steering ability. Dealers will replace the lower intermediate steering shaft and inspect the upper intermediate shaft and steering column lower bearing for damage, they will be repaired or replaced as necessary. If the steering column lower bearing has separated, a retainer clip will be installed.

Additionally, Vehicle owners located where salt is not used who have concerns regarding their steering will have a one-time option to have their vehicles inspected and, if necessary, repaired.

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Mercury Grand Marquis Reviews

The "Panther platform" is a tough one. I purchased this vehicle as my "retirement car". Not so sure if it was a good choice now. It had 38K miles on it when purchased as a used rental. I like to do as many of my maintenance chores as I can. Shortly after I took delivery the trunk light warning wouldn't go off unless I shut the trunk lid numerous times. After that happened several times: the lat...
Bought my Grand Marquis used 8 years ago. It's otherwise a good reliable car. This was my first car brought never had a vehicle used family members or walked wherever needed to go. I do trust my Grand Marquis know this car is very old but will require in giving lots of maintenance replace manifold intake gasket and ball joints for $40 at NAPA AUTO,) Changed plugs, air filters a new alternator a...
Got car used 4 years ago. Only problem I'm seeing are the intake manifold gasket as mines was just replaced after my car stalled at stop sign. Good Luck to other previous owners with this problem.

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