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
$
388
to $
575
2003 Mercury Grand Marquis
$
134
to $
199
2003 Mercury Grand Marquis
$
285
to $
381
2003 Mercury Grand Marquis
$
137
to $
223
2003 Mercury Grand Marquis
$
551
to $
777

2003 Mercury Grand Marquis Problems

Transmission Problems Common Due to Front Pump Failure

Transmission problems are common in this model, often as a result of a failed front pump. The pump loses its ability to create hydraulic pressure, which an automatic transmission needs to function. A sign of front pump failure can be a whine type noise.

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.

Misfire due to failed spark plugs or ignition coil

Bad spark plugs or an ignition coil can cause ignition misfire, which will illuminate the Check Engine Light.

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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

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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