Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Lincoln Navigator RWDFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| ABS Control Module | At left side of engine compartment. |
| Air Suspension Module | Under left side of dash. |
| Climate Controlled Seat Module (Driver's/Passenger's) | Under respective seat. |
| Driver Seat Module | Under driver's seat. |
| Electronic Automatic Temperature Control Module | In center of dash. See Figure. |
| Electronic Hidden Antenna Module | At right "C" pillar. |
| Four Wheel Drive Control Module | At left "B" pillar. |
| Heater Blower Control Module | Behind dash. |
| Inlet Manifold Runner Control Module (5.4L 4V) | On top front of engine. See Figure. |
| Liftgate Chime Module | In left side of liftgate. |
| Low Tire Pressure Module | At left "C" pillar. |
| Parking Aid Module | At left side of cargo area, behind trim. |
| Passive Anti-Theft Transceiver | Behind left side of dash, near steering column. |
| Power Liftgate Module | At left side of cargo area, behind trim. See Figure. |
| Powertrain Control Module | On right side of firewall. |
| Restraints Control Module | Below center console or under seat. |
| Roof Opening Panel Module | In roof panel. |
| Vehicle Security Module | Under right side of dash. |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.