2003 INFINITI QX4 Service and Repair Manual

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Factory-Grade Data

2003 INFINITI QX4 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

  • 3.5L 3498CC V6 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 INFINITI QX4 Recalls & Complaints

NHTSA #11V24400020/04/2011Component: STEERING:COLUMN

NISSAN IS RECALLING CERTAIN MODEL YEAR 1996-2004 PATHFINDER AND MODEL YEAR 1997-2003 INFINITI QX4 VEHICLES ORIGINALLY SOLD, OR CURRENTLY REGISTERED IN, CONNECTICUT, DELAWARE, IOWA, ILLINOIS, INDIANA,

Consequence

THE STRUT HOUSING MAY CRACK AND PULL AWAY FROM THE INNER HOOD LEDGE ASSEMBLY. THIS MAY LEAD TO GRI

Remedy

NISSAN WILL INSPECT THE STRUT HOUSING AND REPAIR THE VEHICLES AS NECESSARY, FREE OF CHARGE. AN INTE

NHTSA #15V28700015/05/2015Component: AIR BAGS

Nissan North America, Inc. (Nissan) is recalling certain model year 2001-2003 Nissan Maxima, 2002-2004 Pathfinder, 2002-2006 Sentra, 2002-2003 Infiniti QX4 and I35, 2003 FX35 and FX45, and 2001 I30 ve

Consequence

In the event of a crash necessitating deployment of the passenger's frontal air bag, the inflator co

Remedy

Nissan will notify owners, and dealers will replace the passenger air bag inflator, free of charge.

NHTSA #22E06600009/08/2022Component: AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE

Nissan North America, Inc. (Nissan) is recalling certain air bag inflator replacement service parts that may have been installed as part of a theft or collision repair. The parts include certain pass

Consequence

An inflator explosion may result in sharp metal fragments striking the driver or other occupants res

Remedy

Dealers will inspect and replace the inflators as necessary, free of charge. Owner notification let

NHTSA #20V00800009/01/2020Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Nissan North America, Inc. (Nissan) is recalling certain 2001-2003 Maxima, 2002-2006 Sentra, 2002-2004 Pathfinder, 2007-2011 Versa Sedan and Versa Hatchback, 2001-2004 Infiniti I30 and I35, 2002-2003

Consequence

An inflator explosion may result in sharp metal fragments striking the driver or other occupants res

Remedy

Nissan will notify owners, and dealers will replace the front passenger air bag inflators with alter

TSB #11031720

CERTIFICATION LABEL AND VIN PLATE REPLACEMENT SERVICE INFORMATION Because of collision damage or other vehicle repair, a replacement Certification Label or VIN Plate/Label may be needed. HINT: Certification Label = FMVSS (Federal Motor Vehi

TSB #11002539

INTELLIGENT KEY NOT DETECTED / ENGINE WILL NOT START This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.

TSB #11001182

WINDOW GLASS WARRANTY INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.

TSB #11001179

REMOVING FOREIGN MATERIAL FROM THE WINDOW GLASS This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.

TSB #11001177

WINDSHIELD CRACKING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.

TSB #10232646

REMOVING FOREIGN MATERIAL FROM THE WINDOW GLASS This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.

TSB #10232645

WHEEL BEARING COLLISION DAMAGE This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.

TSB #10232644

WINDSHIELD CRACKING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.

Showing the 8 most recent of 71 technical service bulletins on file with NHTSA.

20110509Component: STEERINGCrash reported4 injured

TL*THE CONTACT OWNS A 2003 INFINITI QX4. THE CONTACT STATED THE STEERING WHEEL BECAME UNRESPONSIVE WHILE CHANGING LANES. AS A RESULT THE VEHICLE WAS INVOLVED IN A ROLLOVER CRASH. A POLICE REPORT WAS F

20031015Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported

WHILE DRIVING AT 35 MPH ON A DRY SINGLE LANE PAVED ROAD, I UNAVOIDABLY RAN MY INFINITI QX4 SUV OVER A TREE BRANCH IN THE ROAD. THE TREE BRANCH BRIEFLY BECAME ENTANGLED UNDER THE VEHICLE AND THEN WAS

20190731Component: AIR BAGS

I KEEP GETTING NOTICES ABOUT THIS AIRBAG RECALL, BUT THIS VEHICLE WAS DONATED TO HUDSON HIGH SCHOOL AND BROKEN DOWN FOR PARTS. THIS VEHICLE HASN'T BEEN ON THE ROAD FOR OVER 3 YEARS. PLEASE TAKE THIS O

20180620Component: STRUCTURE:BODY

BOUGHT A USED CAR FROM A USED CAR DEALER WITH 1 PREVIOUS OWNER. IN 2011 A RECALL WAS SUPPOSEDLY DONE BY INDICATING "INSPECTED!" WHY WASN'T THE PARTS REPLACED?

20180620Component: STEERING

BOUGHT A USED CAR FROM A USED CAR DEALER WITH 1 PREVIOUS OWNER. IN 2011 A RECALL WAS SUPPOSEDLY DONE BY INDICATING "INSPECTED!" WHY WASN'T THE PARTS REPLACED?

Showing the 5 most serious of 25 complaints filed with NHTSA.

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