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2004 Mercury Grand Marquis Problems

Find the most common issues based on 2004 Mercury Grand Marquis owner complaints.
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Most Common 2004 Mercury Grand Marquis Problems

The headlights on the Mercury Grand Marquis may become dim, come on intermittently, fail to shut off, or stop working all together. This vehicle is equipped with a control module for the exter...
The 1996-2001 Mercury Grand Marquis with a 100% plastic intake manifold is known for engine overheating, even with normal use, and a coolant leak from the front of the manifold. This will often tr...
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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0 Known 2004 Mercury Grand Marquis Brakes Problems

2 Known 2004 Mercury Grand Marquis Drive Train Problems

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....
Transmission wear is common. Pieces of broken components are often discovered in the transmission oil pan when the transmission is serviced.

3 Known 2004 Mercury Grand Marquis Electrical & Lights Problems

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.
The engine may overheat at idle when the AC is on. A new, upgraded fan motor and resistor may be required to correct this concern.

4 Known 2004 Mercury Grand Marquis Engine Problems

The 1996-2001 Mercury Grand Marquis with a 100% plastic intake manifold is known for engine overheating, even with normal use, and a coolant leak from the front of the manifold. This will often tr...
Bad spark plugs or an ignition coil can cause ignition misfire, which will illuminate the Check Engine Light.
The heater hose outlet may leak coolant at the back of the intake manifold. Sometimes this is misdiagnosed as a leaking intake manifold gasket because it resembles a leaking manifold.

1 Known 2004 Mercury Grand Marquis Exhaust & Emissions Problem

0 Known 2004 Mercury Grand Marquis Heating & Air Conditioning Problems

0 Known 2004 Mercury Grand Marquis Maintenance Problems

0 Known 2004 Mercury Grand Marquis Miscellaneous Problems

0 Known 2004 Mercury Grand Marquis Suspension & Steering Problems

10
Known 2004 Mercury Grand Marquis Problems & Complaints

The 1996-2001 Mercury Grand Marquis with a 100% plastic intake manifold is known for engine overheating, even with normal use, and a coolant leak from the front of the manifold. This will often tr...
The heater hose outlet may leak coolant at the back of the intake manifold. Sometimes this is misdiagnosed as a leaking intake manifold gasket because it resembles a leaking manifold.
Bad spark plugs or an ignition coil can cause ignition misfire, which will illuminate the Check Engine Light.
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.
The engine may overheat at idle when the AC is on. A new, upgraded fan motor and resistor may be required to correct this concern.
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....
The Mercury Grand Marquis 4.6L V8 engine is known for displaying the normal symptoms of a coolant leak, including overheating, especially when the vehicle is idling, the strong smell of coolant fro...
Transmission wear is common. Pieces of broken components are often discovered in the transmission oil pan when the transmission is serviced.
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