Lincoln Navigator 2003 Quick Reference Guide

To reset the oil change light, turn the ignition to the 'ON' position without starting the engine. Press the 'SETUP' button until the display reads 'OIL LIFE % HOLD RESET = NEW'. Press and hold the 'RESET' button until it reads 'OIL LIFE 100%'.
Common causes for air suspension failure include leaks in the air springs, a faulty air compressor, or electrical issues. Inspect the air springs for leaks and listen for the compressor running excessively. If necessary, consult a professional for an accurate diagnosis.
The recommended engine oil for the 2003 Lincoln Navigator is 5W-20. It is important to use a high-quality oil that meets Ford specification WSS-M2C153-H.
To change the cabin air filter, locate the filter housing under the hood near the windshield on the passenger side. Remove the cover, take out the old filter, and insert a new one, ensuring it is properly seated. Reattach the cover securely.
Overheating could be due to a low coolant level, a faulty thermostat, a malfunctioning water pump, or a clogged radiator. Check the coolant level and inspect the radiator and hoses for leaks. If the problem persists, have a professional inspect the cooling system.
To jump-start your Navigator, connect the positive cable to the positive terminal of the dead battery, then to the positive terminal of the good battery. Connect the negative cable to the negative terminal of the good battery, then to a metal ground on the engine block of the dead vehicle. Start the booster vehicle, then start the Navigator.
Check the window lock switch to ensure it is not engaged. Inspect the fuses related to the power windows in the fuse box. If the windows still do not work, the issue may be with the window motor or switch, requiring professional attention.
It is recommended to replace the spark plugs every 100,000 miles under normal driving conditions. However, if your vehicle is experiencing rough idling or poor acceleration, it may be necessary to replace them sooner.
Signs of a failing alternator include dimming headlights, electrical issues, a dead battery, and the battery warning light on the dashboard. If you experience these symptoms, have the alternator tested and replaced if necessary.
Insert the existing key into the ignition and turn it to the 'ON' position eight times within 10 seconds, ending in 'ON'. The door locks should cycle to confirm programming mode. Press any button on the new key fob to program it, then turn the ignition off to exit.