2003 Mercury Grand Marquis Repair and Maintenance

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

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.

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interment problem ( dome and back reading lights) any one else have this problem and what was the fix.

check enginelight came on an I took it to auto zone and it said plug # 2 where is it on the left or right?

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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 ...

Bought 2003 new..Always had "slippage" type noise when automatic transmission shifted at 42 mph. Dealer said it was normal, did nothing. Now have over 95,000 and makes worse noise at Every Shift! Developed crack in leather seat when 3 months old & Dealer wouldn't take care of it. They didn't deserve to be a Mercury Dealer!! NOW they won't be, as of Jan. 1st, 2011 Jacksonville,Fl.

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