2003 Mercury Grand Marquis Repair and Maintenance

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

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).

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.

Spring in Seat Belt Buckle May Fail

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 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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2003 Mercury Grand Marquis Reviews

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...
I have a 2003 Mercury Grand Marquis well first my oil gauge was going up n down i just thought when i crank it up it does that. It kept downing that since September the day i took it to go see whats wrong was October 10 on my way there I was at a red light it made a really loud horrible sound and it quit on me. I just don't know what to do. The dealer ship said it expire because I went over my ...
The 2003 Mercury Grand Marquis has been the most problematic one my family has ever had, and we've had them constantly since the late '70s. This one had electrical issues from the get-go. The door locks and windows and wipers all got funky at least once, and one door lock has never fully functioned. The AC has gone out a few times, the brakes need replacing more often than a NY cabbie's, we've ...

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