2005 Mercury Grand Marquis Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2005 Mercury Grand Marquis

2005 Mercury Grand Marquis Problems

Transmission Failure 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.

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.

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2005 Mercury Grand Marquis Questions

my passenger window went down but wont come back up (1 answer)

how do I get the door panel off to look at the window

leaking power steering fluid around power steering pressure switch. (1 answer)

I can't determine if it is there or where the wire plugs in.

Car starts and drives then will die without warning. what causes this? (2 answers)

I have a 2005 grand marquis that will dies without warning while being driven. Upon first looking into the possible issues found it vould be a bad throttle position sensor so changes that and cleaned the throttle body. Didnt solve the problem so changes the idle control valve and still no change ...

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2005 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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2005 Mercury Grand Marquis Reviews

San Antonio Tx. August 8th.2014 My 2005 Grand Marqui has almost 40,000 miles and has been a great comfortable car. The light switch and the light modual have been replaced costing me a total of a little over $800.00. I have only had to replace the tires ONCE! I keep it serviced quite regularly. The appearance of my car looks absolutely great! It is a black color which looks so v...
Had problems with the lighting modual at about 45,000. (BIG $$$$) Now experiencing problems with the ac-heater fan speed control. Replaced the a/c fan motor at about 35,000 miles. Car otherwise OK. Electrical system sucks.
light control modules for my beautiful mgm failed no headlights almost ticket. ford should recall or pay me fix it. thanks for almost giving me a stroke drivin rain snow and NIGHT gwen

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