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2003 Lincoln Navigator Problems

Find the most common issues based on 2003 Lincoln Navigator owner complaints.
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Most Common 2003 Lincoln Navigator Problems

Prior to jacking or lifting a vehicle with air suspension, you must turn off the suspension switch. The switch is generally located in the trunk or on the right side of the passenger foot well.
In high dust areas, problems with the EGR system are common. The filter for the EGR solenoid may plug and cause the EGR to activate when it should not; this can cause the engine to stall. The dir...
Check the battery cable ends frequently for corrosion. Corrosion can easily migrate under the cable insulation and cause numerous electrical faults and drivability issues.
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0 Known 2003 Lincoln Navigator Brakes Problems

1 Known 2003 Lincoln Navigator Drive Train Problem

You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 15,000 to 30,000 miles. If the fluid is dark or burned then the transmission fluid shou...

3 Known 2003 Lincoln Navigator Electrical & Lights Problems

Check the battery cable ends frequently for corrosion. Corrosion can easily migrate under the cable insulation and cause numerous electrical faults and drivability issues.
When replacing the battery, make sure the battery height is correct; a battery that is too tall can cause a short circuit when the hood is closed.
Corrosion can form at the grounding points near the battery. There may be electrical faults and the engine may crank but not start.

5 Known 2003 Lincoln Navigator Engine Problems

Erratic engine coolant temperature or intermittent overheating can be caused by corrosion inside the water pump. The impeller may spin on the water pump shaft or the impeller may corrode. Either ...
The Lincoln Navigator is known for displaying the normal symptoms of a coolant leak, including overheating, the strong smell of coolant from the engine, and illumination of the low engine coolant w...
Due to age and possible damage during removal, it is recommended to replace the spark plug boots when replacing the spark plugs,

4 Known 2003 Lincoln Navigator Exhaust & Emissions Problems

In high dust areas, problems with the EGR system are common. The filter for the EGR solenoid may plug and cause the EGR to activate when it should not; this can cause the engine to stall. The dir...
A vacuum leak from the PCV grommet vacuum leak can cause the Check Engine Light to illuminate. The molded rubber hose connections may crack and collapse, causing the vehicle to run roughly. A dama...
An exhaust leak may develop in front of the catalytic converter. This type of leak should be corrected as soon a possible to avoid damaging the catalytic converter.

1 Known 2003 Lincoln Navigator Heating & Air Conditioning Problem

Checking and adjusting the AC compressor clutch air gap can extend the service life of the AC compressor.

0 Known 2003 Lincoln Navigator Maintenance Problems

1 Known 2003 Lincoln Navigator Miscellaneous Problem

Do not use air filters with oil-coated elements. They may cause premature failure of the mass air flow sensor; this is not covered under the warranty.

2 Known 2003 Lincoln Navigator Suspension & Steering Problems

Prior to jacking or lifting a vehicle with air suspension, you must turn off the suspension switch. The switch is generally located in the trunk or on the right side of the passenger foot well.
Even though the manufacturer does not call for regular servicing, our technicians recommend servicing the power steering fluid regularly.

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Known 2003 Lincoln Navigator Problems & Complaints

You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 15,000 to 30,000 miles. If the fluid is dark or burned then the transmission fluid shou...
The Lincoln Navigator is known for displaying the normal symptoms of a coolant leak, including overheating, the strong smell of coolant from the engine, and illumination of the low engine coolant w...
Check the battery cable ends frequently for corrosion. Corrosion can easily migrate under the cable insulation and cause numerous electrical faults and drivability issues.
A vacuum leak from the PCV grommet vacuum leak can cause the Check Engine Light to illuminate. The molded rubber hose connections may crack and collapse, causing the vehicle to run roughly. A dama...
An illuminated Check Engine Light may be caused by an engine misfire due to water or engine coolant in the spark plug recesses.
An exhaust leak may develop in front of the catalytic converter. This type of leak should be corrected as soon a possible to avoid damaging the catalytic converter.
Prior to jacking or lifting a vehicle with air suspension, you must turn off the suspension switch. The switch is generally located in the trunk or on the right side of the passenger foot well.
In high dust areas, problems with the EGR system are common. The filter for the EGR solenoid may plug and cause the EGR to activate when it should not; this can cause the engine to stall. The dir...
Checking and adjusting the AC compressor clutch air gap can extend the service life of the AC compressor.
Do not use air filters with oil-coated elements. They may cause premature failure of the mass air flow sensor; this is not covered under the warranty.
Due to age and possible damage during removal, it is recommended to replace the spark plug boots when replacing the spark plugs,
Even though the manufacturer does not call for regular servicing, our technicians recommend servicing the power steering fluid regularly.
The head gaskets are prone to oil leaks.
The lower intake manifold is plastic and may come apart completely.
Corrosion can form at the grounding points near the battery. There may be electrical faults and the engine may crank but not start.
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