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 ProblemsMalfunctioning 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).
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.
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.
2003 Mercury Grand Marquis QuestionsABS 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.
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?
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 .
2003 Mercury Grand Marquis RecallsHeadlights 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.