2003 Lincoln Navigator Service and Repair Manual

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Factory-Grade Data

2003 Lincoln Navigator service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Built for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and use wiring diagrams and system sections to diagnose problems faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical coverage with wiring diagrams
  • Coverage across key systems: engine, transmission, brakes, steering, suspension, HVAC, and more

Trims covered

  • Base Sport Utility 4-Door

Engines covered

  • 5.4L 330Cu. In. V8 GAS DOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2003 Lincoln Navigator Recalls & Complaints

NHTSA #06E06400017/07/2006Component: EXTERIOR LIGHTING

CERTAIN TRADESONIC COMBINATION LAMPS SOLD AS REPLACEMENT LAMPS FOR USE ON THE ABOVE LISTED PASSENGER VEHICLES. COMBINATION LAMPS NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL TO CONFORM WITH THE REQUI

Consequence

LACK OF AMBER SIDE REFLECTORS IN THE LAMPS WILL DECREASE LIGHTING VISIBILITY TO OTHER DRIVERS AND MA

Remedy

TRADESONIC WILL NOTIFY OWNERS AND REPLACE THE LAMPS FREE OF CHARGE. THE RECALL IS EXPECTED TO BEGIN

TSB #11005305

This article supersedes TSB 22-2219 to update the Parts List and Service Procedure to clarify applicable steps by vehicle application. Some 2003-2020 Expedition/Navigator and 2006-2020 F-150 (non-Raptor) vehicles equipped with 4WD may exhib

TSB #10235153

For 2000-2024 Ford and Lincoln vehicles, swapping a module from a vehicle for diagnosis purposes is likely to cause errors and is not recommended. It is also not recommended to order a replacement module using a vehicle identification numbe

TSB #10214754

Some 2003-2020 Expedition/Navigator and 2006-2020 F-150 (non-Raptor) vehicles equipped with 4WD may exhibit grinding/clicking/ratcheting noise from the front wheel area. This may be due to partial engagement of the integrated wheel ends (IW

TSB #10181917

Some 2003-2020 Expedition/Navigator and 2006-2020 F-150 vehicles equipped with TOD transfer cases may exhibit grinding/clicking/ratcheting noise from the front wheel area. This may be due to partial engagement of the integrated wheel ends (

TSB #10177863

This article supersedes TSB 19-2026 to update the vehicle model years affected. Some 2000 and newer Ford/Lincoln/Mercury vehicles equipped with aluminum body panels may exhibit corrosion concerns appearing as bubbled and/or peeling paint wi

TSB #10156863

Some 2000 and newer Ford, Lincoln and Mercury vehicles equipped with aluminum body panels may exhibit corrosion concerns appearing as bubbled and/or peeling paint with or without accompanying white dust. Panel replacement is recommended. Fo

TSB #10155551

Some 2000 and newer Ford, Lincoln and Mercury vehicles equipped with aluminum body panels may exhibit corrosion concerns appearing as bubbled and/or peeling paint with or without accompanying white dust. Panel replacement is recommended. Fo

TSB #10028736

FORD: SOME VEHICLES MAY EXHIBIT OIL SEPARATION FROM THE INTERNAL LUBE FOUND IN THE UNITIZED CARTRIDGE SEAL. OIL SEPARATION APPEARS TO BE AND IS OFTEN MISDIAGNOSED, AS AN AXLE LUBE LEAK. *PE

Showing the 8 most recent of 150 technical service bulletins on file with NHTSA.

20050406Component: AIR BAGSCrash reported3 injured

WHILE DRIVING AT 45 MPH AN ACCIDENT OCCURRED. THE OTHER VEHICLE MADE A SUDDEN LEFT TURN, AND CONSUMER'S VEHICLE CAUGHT THE TAIL END OF THE OTHER VEHICLE. HOWEVER, THE AIR BAG DID NOT DEPLOY.*AK

20140320Component: POWER TRAINCrash reported1 injured

TL* THE CONTACT OWNS 2003 LINCOLN NAVIGATOR. THE CONTACT STATED THAT WHILE STANDING OUTSIDE OF THE VEHICLE, THE VEHICLE STARTED TO ROLL BACKWARD. THE ENGINE WAS OFF AND THE TRANSMISSION WAS IN PARK.

20110929Component: AIR BAGSCrash reported

WHILE DRIVING IN A PARKING LOT A CAR PULLED OUT IN FRONT OF MY 2003 NAVIGATOR AS I HIT THE BRAKES I FELT MY SUV DROP FROM THE FRONT. THE TIRE SKIDDED AND I HIT THE CAR THAT WAS PULLING OUT. AFTER THE

20110929Component: SUSPENSIONCrash reported

WHILE DRIVING IN A PARKING LOT A CAR PULLED OUT IN FRONT OF MY 2003 NAVIGATOR AS I HIT THE BRAKES I FELT MY SUV DROP FROM THE FRONT. THE TIRE SKIDDED AND I HIT THE CAR THAT WAS PULLING OUT. AFTER THE

20110929Component: VEHICLE SPEED CONTROLCrash reported

WHILE DRIVING IN A PARKING LOT A CAR PULLED OUT IN FRONT OF MY 2003 NAVIGATOR AS I HIT THE BRAKES I FELT MY SUV DROP FROM THE FRONT. THE TIRE SKIDDED AND I HIT THE CAR THAT WAS PULLING OUT. AFTER THE

Showing the 5 most serious of 179 complaints filed with NHTSA.

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