2003 Mercury Grand Marquis Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2003 Mercury Grand Marquis

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2003 Mercury Grand Marquis
$
351
to $
498
2003 Mercury Grand Marquis
$
138
to $
224
2003 Mercury Grand Marquis
$
556
to $
905
2003 Mercury Grand Marquis
$
117
to $
196
2003 Mercury Grand Marquis
$
641
to $
919

2003 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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2003 Mercury Grand Marquis Questions

ABS pulsates peddle, R&R rotors,pads, speed sens good. unplug ABS mod no pulsate (1 answer)

Replaced ABS module and the same issue. ABS unplugged or removed pulsating not felt. What else could cause this issue.

Re: anti theft? Can you delete it? Possible I need new Engine computer. Lost her (1 answer)

Possible I need new computer. The keys would need to be programmed too. But if I'm wrong I'm out several hundred dollars. A yo e know about the computers in this vehicle?

Could the rear end be locked. Back tire on driver side want move (1 answer)

Making a weird noise was driving thought it was a flat it wasn't tried to stop on brakes they wouldn't move because the tire wouldn't move it's stuck on the driver side .

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2003 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.

See More Recalls (1)

2003 Mercury Grand Marquis Reviews

Rated
based on 6 customer reviews
Two ton a fun! Almost economy car freeway MPG (idling @ 60mph), quiet, relaxed, upscale, bullet proof engine/ drive train, cheaper parts and insurance! 2003+ GS (base car) is the car to get (03+-latest upgrades), change out lighting control module (weak relay-see ebay/forums) run synth 5-30 only and enjoy your V8/281 powered lux cruiser! Bought an 03 for my daughter with 62k on it, one old l...
I BOUGHT A USED 2003 GRAND MARQUEE LS IN JULY 2012. I WAS TOLD THAT THEY (DEALER SHIP) HAD SENT IT TO THE SHOP AND EVERYTHING WORKED FINE .I BOUGHT IT AT ABOUT 7 PM CAUSE I WAS RUNNING LATE AND THEY WERE BOUT TO CLOSE AND MY OTHER CAR WAS NOT RUNNING . I DID NOT TAKE TIME TO DO A ROAD TEST ON IT AND TOOK THEIR WORD FOR IT .WHICH WAS A MISTAKE .NOW TO THE PROBLEM. AS I WAS DRIVING HOME I HEARD...
My 2003 Mercury Grand Marquis headlights only turn on when they want to.I think it should be on recall cause in my opinion this is a safety hazard.I can be going down the road at night and they just cut off.This is dangerous.However after spending about $500.00 I have finally found the problem it was the light module.I feel that Ford/Mercury should put this on recall and pay me my money I spent...

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