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Most Common Car Issues

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Model
Grand Marquis
Model Year
2003

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Engine Brake (hp) From
Engine Configuration
Engine Manufacturer
Engine Number of Cylinders
Make
Other Engine Info

MOST COMMON PROBLEMS

MERCURY Grand Marquis 2003

The 2003 Mercury Grand Marquis, manufactured by Ford Motor Company of Canada, Ltd., is a classic sedan with a V-shaped 8-cylinder engine delivering 300 horsepower. This model features a 4.6-liter gasoline engine with dual overhead cam (DOHC) valve train design for improved performance. Safety features include front, side, and curtain airbags for both the driver and passenger in the first row. As a spacious 4-door passenger car, it offers comfort and reliability.

Spec:

Engine Brake (hp) From
300
Engine Configuration
V-Shaped
Engine Manufacturer
Ford
Engine Number of Cylinders
8
Other Engine Info
Engine Code "V" available on Mercury Marauder Only

Problems:

Oil leaks
The V8 engines in older models like the 2003 Mercury Grand Marquis can develop oil leaks, often from the valve cover gaskets or oil pan gaskets.
Cooling system issues
The age of the vehicle can lead to problems with the cooling system, including radiator failures, thermostat issues, or leaks in the hoses.
Intake manifold cracking
The plastic intake manifolds used in some Ford V8 engines, including the one in the 2003 Grand Marquis, are prone to cracking and leaking coolant.
Spark plug blowouts
The V8 engines in this model have been known to suffer from spark plug blowouts due to insufficient thread engagement in the cylinder heads.
Timing chain wear
Over time, the timing chain and associated components can wear out, leading to poor engine performance or even failure.
Fuel pump failure
Older vehicles like the 2003 Grand Marquis may experience fuel pump issues, leading to engine stalling or difficulty starting.
Egr valve problems
Exhaust Gas Recirculation (EGR) valves can become clogged or fail, leading to rough idling or poor engine performance.
Mass air flow sensor failure
The Mass Air Flow (MAF) sensor can become dirty or fail, causing issues with air-fuel mixture and engine performance.
Catalytic converter failure
The catalytic converters in older vehicles can become clogged or fail, leading to poor engine performance and failed emissions tests.
MERCURY Grand Marquis 2003

The 2003 Mercury Grand Marquis LS is a classy sedan featuring a powerful 4.6L V8 engine with 300 hp, manufactured by Ford. Safety is prioritized with curtain and side airbags for both front row occupants. This model is produced in Ontario, Canada, and falls under the Class 1 weight category. Its dual overhead cam (DOHC) valve train ensures smooth and efficient performance.

Spec:

Engine Brake (hp) From
300
Engine Configuration
V-Shaped
Engine Manufacturer
Ford
Engine Number of Cylinders
8
Other Engine Info
Engine Code "V" available on Mercury Marauder Only

Problems:

Oil leaks
The V8 engines in older models like the 2003 Mercury Grand Marquis can develop oil leaks, often from the valve cover gaskets or oil pan gaskets.
Cooling system issues
The age of the vehicle can lead to problems with the cooling system, including radiator failures, thermostat issues, or leaks in the hoses.
Intake manifold cracking
The plastic intake manifolds used in some Ford V8 engines, including the one in the 2003 Grand Marquis, are prone to cracking and leaking coolant.
Spark plug blowouts
The V8 engines in this model have been known to suffer from spark plug blowouts due to insufficient thread engagement in the cylinder heads.
Timing chain wear
Over time, the timing chain and associated components can wear out, leading to poor engine performance or even failure.
Fuel pump failure
Older vehicles like the 2003 Grand Marquis may experience fuel pump issues, leading to engine stalling or difficulty starting.
Egr valve problems
Exhaust Gas Recirculation (EGR) valves can become clogged or fail, leading to rough idling or poor engine performance.
Mass air flow sensor failure
The Mass Air Flow (MAF) sensor can become dirty or fail, causing issues with air-fuel mixture and engine performance.
Catalytic converter failure
The catalytic converters in older vehicles can become clogged or fail, leading to poor engine performance and failed emissions tests.
MERCURY Grand Marquis 2003

The 2003 Mercury Grand Marquis LS is a robust sedan powered by a 4.6L V8 engine delivering 300 horsepower. Manufactured by the Ford Motor Company of Canada, this vehicle features comprehensive safety with front, side, and curtain airbags for the driver and passenger. Built in Talbotville, Ontario, it offers a classic V-shaped engine configuration and a dual overhead cam valve train design. This model exemplifies the balance of power and safety in a full-size sedan.

Spec:

Engine Brake (hp) From
300
Engine Configuration
V-Shaped
Engine Manufacturer
Ford
Engine Number of Cylinders
8
Other Engine Info
Engine Code "V" available on Mercury Marauder Only

Problems:

Oil leaks
The V8 engines in older models like the 2003 Mercury Grand Marquis can develop oil leaks, often from the valve cover gaskets or oil pan gaskets.
Cooling system issues
The age of the vehicle can lead to problems with the cooling system, including radiator failures, thermostat issues, or leaks in the hoses.
Intake manifold cracking
The plastic intake manifolds used in some Ford V8 engines, including the one in the 2003 Grand Marquis, are prone to cracking and leaking coolant.
Spark plug blowouts
The V8 engines in this model have been known to suffer from spark plug blowouts due to insufficient thread engagement in the cylinder heads.
Timing chain wear
Over time, the timing chain and associated components can wear out, leading to poor engine performance or even failure.
Fuel pump failure
Older vehicles like the 2003 Grand Marquis may experience fuel pump issues, leading to engine stalling or difficulty starting.
Egr valve problems
Exhaust Gas Recirculation (EGR) valves can become clogged or fail, leading to rough idling or poor engine performance.
Mass air flow sensor failure
The Mass Air Flow (MAF) sensor can become dirty or fail, causing issues with air-fuel mixture and engine performance.
Catalytic converter failure
The catalytic converters in older vehicles can become clogged or fail, leading to poor engine performance and failed emissions tests.
MERCURY Grand Marquis 2003

The 2003 Mercury Grand Marquis LS is a V8-powered sedan with a 4.6L engine, producing at least 300 horsepower. Manufactured by Ford Motor Company of Canada, this model features dual overhead camshaft (DOHC) design, and comprehensive airbag coverage for the first row. With a gross vehicle weight rating under 6,000 lbs, it offers a robust yet comfortable ride for passengers.

Spec:

Engine Brake (hp) From
300
Engine Configuration
V-Shaped
Engine Manufacturer
Ford
Engine Number of Cylinders
8
Other Engine Info
Engine Code "V" available on Mercury Marauder Only

Problems:

Oil leaks
The V8 engines in older models like the 2003 Mercury Grand Marquis can develop oil leaks, often from the valve cover gaskets or oil pan gaskets.
Cooling system issues
The age of the vehicle can lead to problems with the cooling system, including radiator failures, thermostat issues, or leaks in the hoses.
Intake manifold cracking
The plastic intake manifolds used in some Ford V8 engines, including the one in the 2003 Grand Marquis, are prone to cracking and leaking coolant.
Spark plug blowouts
The V8 engines in this model have been known to suffer from spark plug blowouts due to insufficient thread engagement in the cylinder heads.
Timing chain wear
Over time, the timing chain and associated components can wear out, leading to poor engine performance or even failure.
Fuel pump failure
Older vehicles like the 2003 Grand Marquis may experience fuel pump issues, leading to engine stalling or difficulty starting.
Egr valve problems
Exhaust Gas Recirculation (EGR) valves can become clogged or fail, leading to rough idling or poor engine performance.
Mass air flow sensor failure
The Mass Air Flow (MAF) sensor can become dirty or fail, causing issues with air-fuel mixture and engine performance.
Catalytic converter failure
The catalytic converters in older vehicles can become clogged or fail, leading to poor engine performance and failed emissions tests.
MERCURY Grand Marquis 2003

The 2003 Mercury Grand Marquis LS is a robust sedan powered by a 4.6L V8 engine producing 300 hp. Manufactured in Talbotville, Ontario by Ford Motor Company of Canada, it features dual overhead cam (DOHC) and offers ample safety with front and side airbags. This vehicle is classified under Class 1 for gross vehicle weight, making it a solid choice for a comfortable and reliable passenger car.

Spec:

Engine Brake (hp) From
300
Engine Configuration
V-Shaped
Engine Manufacturer
Ford
Engine Number of Cylinders
8
Other Engine Info
Engine Code "V" available on Mercury Marauder Only

Problems:

Oil leaks
The V8 engines in older models like the 2003 Mercury Grand Marquis can develop oil leaks, often from the valve cover gaskets or oil pan gaskets.
Cooling system issues
The age of the vehicle can lead to problems with the cooling system, including radiator failures, thermostat issues, or leaks in the hoses.
Intake manifold cracking
The plastic intake manifolds used in some Ford V8 engines, including the one in the 2003 Grand Marquis, are prone to cracking and leaking coolant.
Spark plug blowouts
The V8 engines in this model have been known to suffer from spark plug blowouts due to insufficient thread engagement in the cylinder heads.
Timing chain wear
Over time, the timing chain and associated components can wear out, leading to poor engine performance or even failure.
Fuel pump failure
Older vehicles like the 2003 Grand Marquis may experience fuel pump issues, leading to engine stalling or difficulty starting.
Egr valve problems
Exhaust Gas Recirculation (EGR) valves can become clogged or fail, leading to rough idling or poor engine performance.
Mass air flow sensor failure
The Mass Air Flow (MAF) sensor can become dirty or fail, causing issues with air-fuel mixture and engine performance.
Catalytic converter failure
The catalytic converters in older vehicles can become clogged or fail, leading to poor engine performance and failed emissions tests.
MERCURY Grand Marquis 2003

The 2003 Mercury Grand Marquis, manufactured by Ford Motor Company of Canada, is a classic sedan with a powerful 4.6L V8 engine delivering at least 300 hp. This model features dual overhead cam (DOHC) and provides safety with front, side, and curtain airbags for the first-row passengers. As a Class 1 passenger car, it offers a comfortable and secure driving experience with a manual seat belt system. This Grand Marquis LS was assembled in St. Thomas, Ontario.

Spec:

Engine Brake (hp) From
300
Engine Configuration
V-Shaped
Engine Manufacturer
Ford
Engine Number of Cylinders
8
Other Engine Info
Engine Code "V" available on Mercury Marauder Only

Problems:

Oil leaks
The V8 engines in older models like the 2003 Mercury Grand Marquis can develop oil leaks, often from the valve cover gaskets or oil pan gaskets.
Cooling system issues
The age of the vehicle can lead to problems with the cooling system, including radiator failures, thermostat issues, or leaks in the hoses.
Intake manifold cracking
The plastic intake manifolds used in some Ford V8 engines, including the one in the 2003 Grand Marquis, are prone to cracking and leaking coolant.
Spark plug blowouts
The V8 engines in this model have been known to suffer from spark plug blowouts due to insufficient thread engagement in the cylinder heads.
Timing chain wear
Over time, the timing chain and associated components can wear out, leading to poor engine performance or even failure.
Fuel pump failure
Older vehicles like the 2003 Grand Marquis may experience fuel pump issues, leading to engine stalling or difficulty starting.
Egr valve problems
Exhaust Gas Recirculation (EGR) valves can become clogged or fail, leading to rough idling or poor engine performance.
Mass air flow sensor failure
The Mass Air Flow (MAF) sensor can become dirty or fail, causing issues with air-fuel mixture and engine performance.
Catalytic converter failure
The catalytic converters in older vehicles can become clogged or fail, leading to poor engine performance and failed emissions tests.
MERCURY Grand Marquis 2003

The 2003 Mercury Grand Marquis LS is a classic sedan powered by a robust 4.6L V8 engine, producing 300 horsepower. Manufactured by Ford Motor Company of Canada in Ontario, this vehicle features dual overhead cam (DOHC) and offers comprehensive safety with front, side, and curtain airbags for the first-row occupants. It's a reliable, spacious sedan with a gross vehicle weight rating of up to 6,000 lbs.

Spec:

Engine Brake (hp) From
300
Engine Configuration
V-Shaped
Engine Manufacturer
Ford
Engine Number of Cylinders
8
Other Engine Info
Engine Code "V" available on Mercury Marauder Only

Problems:

Oil leaks
The V8 engines in older models like the 2003 Mercury Grand Marquis can develop oil leaks, often from the valve cover gaskets or oil pan gaskets.
Cooling system issues
The age of the vehicle can lead to problems with the cooling system, including radiator failures, thermostat issues, or leaks in the hoses.
Intake manifold cracking
The plastic intake manifolds used in some Ford V8 engines, including the one in the 2003 Grand Marquis, are prone to cracking and leaking coolant.
Spark plug blowouts
The V8 engines in this model have been known to suffer from spark plug blowouts due to insufficient thread engagement in the cylinder heads.
Timing chain wear
Over time, the timing chain and associated components can wear out, leading to poor engine performance or even failure.
Fuel pump failure
Older vehicles like the 2003 Grand Marquis may experience fuel pump issues, leading to engine stalling or difficulty starting.
Egr valve problems
Exhaust Gas Recirculation (EGR) valves can become clogged or fail, leading to rough idling or poor engine performance.
Mass air flow sensor failure
The Mass Air Flow (MAF) sensor can become dirty or fail, causing issues with air-fuel mixture and engine performance.
Catalytic converter failure
The catalytic converters in older vehicles can become clogged or fail, leading to poor engine performance and failed emissions tests.
MERCURY Grand Marquis 2003

The 2003 Mercury Grand Marquis LS is a classic sedan manufactured by Ford Motor Company of Canada, Ltd. It features a powerful 4.6L V8 engine producing at least 300 hp. Safety is prioritized with front and side airbags for both driver and passenger. This vehicle was built in Talbotville, Ontario, Canada.

Spec:

Engine Brake (hp) From
300
Engine Configuration
V-Shaped
Engine Manufacturer
Ford
Engine Number of Cylinders
8
Other Engine Info
Engine Code "V" available on Mercury Marauder Only

Problems:

Oil leaks
The V8 engines in older models like the 2003 Mercury Grand Marquis can develop oil leaks, often from the valve cover gaskets or oil pan gaskets.
Cooling system issues
The age of the vehicle can lead to problems with the cooling system, including radiator failures, thermostat issues, or leaks in the hoses.
Intake manifold cracking
The plastic intake manifolds used in some Ford V8 engines, including the one in the 2003 Grand Marquis, are prone to cracking and leaking coolant.
Spark plug blowouts
The V8 engines in this model have been known to suffer from spark plug blowouts due to insufficient thread engagement in the cylinder heads.
Timing chain wear
Over time, the timing chain and associated components can wear out, leading to poor engine performance or even failure.
Fuel pump failure
Older vehicles like the 2003 Grand Marquis may experience fuel pump issues, leading to engine stalling or difficulty starting.
Egr valve problems
Exhaust Gas Recirculation (EGR) valves can become clogged or fail, leading to rough idling or poor engine performance.
Mass air flow sensor failure
The Mass Air Flow (MAF) sensor can become dirty or fail, causing issues with air-fuel mixture and engine performance.
Catalytic converter failure
The catalytic converters in older vehicles can become clogged or fail, leading to poor engine performance and failed emissions tests.
MERCURY Grand Marquis 2003

The 2003 Mercury Grand Marquis LS is a robust sedan powered by a 4.6L V8 engine producing 300 hp. Manufactured by Ford in Talbotville, Ontario, it features dual overhead cam (DOHC) design and offers comprehensive safety with curtain and side airbags for the first row. This passenger car, designed for comfort and safety, operates on gasoline and has a gross vehicle weight rating of up to 6,000 lbs.

Spec:

Engine Brake (hp) From
300
Engine Configuration
V-Shaped
Engine Manufacturer
Ford
Engine Number of Cylinders
8
Other Engine Info
Engine Code "V" available on Mercury Marauder Only

Problems:

Oil leaks
The V8 engines in older models like the 2003 Mercury Grand Marquis can develop oil leaks, often from the valve cover gaskets or oil pan gaskets.
Cooling system issues
The age of the vehicle can lead to problems with the cooling system, including radiator failures, thermostat issues, or leaks in the hoses.
Intake manifold cracking
The plastic intake manifolds used in some Ford V8 engines, including the one in the 2003 Grand Marquis, are prone to cracking and leaking coolant.
Spark plug blowouts
The V8 engines in this model have been known to suffer from spark plug blowouts due to insufficient thread engagement in the cylinder heads.
Timing chain wear
Over time, the timing chain and associated components can wear out, leading to poor engine performance or even failure.
Fuel pump failure
Older vehicles like the 2003 Grand Marquis may experience fuel pump issues, leading to engine stalling or difficulty starting.
Egr valve problems
Exhaust Gas Recirculation (EGR) valves can become clogged or fail, leading to rough idling or poor engine performance.
Mass air flow sensor failure
The Mass Air Flow (MAF) sensor can become dirty or fail, causing issues with air-fuel mixture and engine performance.
Catalytic converter failure
The catalytic converters in older vehicles can become clogged or fail, leading to poor engine performance and failed emissions tests.
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