Mercury Grand Marquis Repair and Maintenance

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

Mercury Grand Marquis Problems

Throttle Position Sensors May Fail and Cause Engine Performance Problems

The throttle position sensor (TPS) may fail. Common symptoms of a defective TPS can be rough idle, hard starting, hesitation on acceleration, poor fuel economy, and stalling.

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.

EVP Sensor Failure May Cause Drivability/Fuel Economy Issues

The EGR valve position (EVP) sensor can fail on this vehicle. The EVP sensor measures the EGR valve position and transmits the date to the engine control computer. If it fails, drivability and fuel economy can suffer, the Check Engine Light will commonly illuminate.

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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.

Potential Loss of Steering

Certain vehicles are being recalled because the upper intermediate steering shaft could separate resulting in loss of steering control. This recall includes models previously recalled under campaign #13V-385, these vehicles may have been incorrectly repaired. Dealers will inspect and replace the upper immediate shaft if necessary. If the steering column lower bearing has separated, a retainer clip will be installed.

Potential Loss of Steering

The intermediate shafts connect the steering column to the steering gear. Vehicles in areas where salt is used to de-ice the roads are being recalled because severe corrosion can damage the lower intermediate steering shaft. This can cause the upper intermediate shaft to collapse and separate at the lower steering column bearing. Separation will result in complete loss of steering ability. Dealers will replace the lower intermediate steering shaft and inspect the upper intermediate shaft and steering column lower bearing for damage, they will be repaired or replaced as necessary. If the steering column lower bearing has separated, a retainer clip will be installed.

Additionally, Vehicle owners located where salt is not used who have concerns regarding their steering will have a one-time option to have their vehicles inspected and, if necessary, repaired.

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Mercury Grand Marquis Reviews

The "Panther platform" is a tough one. I purchased this vehicle as my "retirement car". Not so sure if it was a good choice now. It had 38K miles on it when purchased as a used rental. I like to do as many of my maintenance chores as I can. Shortly after I took delivery the trunk light warning wouldn't go off unless I shut the trunk lid numerous times. After that happened several times: the lat...
Bought my Grand Marquis used 8 years ago. It's otherwise a good reliable car. This was my first car brought never had a vehicle used family members or walked wherever needed to go. I do trust my Grand Marquis know this car is very old but will require in giving lots of maintenance replace manifold intake gasket and ball joints for $40 at NAPA AUTO,) Changed plugs, air filters a new alternator a...
Got car used 4 years ago. Only problem I'm seeing are the intake manifold gasket as mines was just replaced after my car stalled at stop sign. Good Luck to other previous owners with this problem.

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