2004 INFINITI Q45 Service and Repair Manual

4.7 · Trusted by 14,000+ mechanics & DIYers
Regular price $29.99 USD
  • Lightning-Fast Downloads
    Optimized files — even slow connections handle it
  • Instant Search & Navigation
    Jump to any procedure or spec with one click
  • Print One or All Pages
    Bring only the pages you need to the shop
  • Covers Every System & Component
    Every procedure for the 2004 INFINITI Q45
Sample Preview

Unlock the Full Manual

Complete repair procedures
Wiring diagrams & schematics
Torque specifications
Full search & bookmarks
$29.99
Buy 2+ Manuals, Save 20% Discount applied automatically at checkout
20% OFF
Secure Checkout
No Subscriptions
Factory-Grade Data

2004 INFINITI Q45 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

  • Premium Sedan 4-Door
  • Base Sedan 4-Door
  • Convenience Sedan 4-Door

Engines covered

  • 4.5L 4494CC 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

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Google Pay
  • Maestro
  • Mastercard
  • PayPal
  • Union Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Vehicle Safety Data

2004 INFINITI Q45 Recalls & Complaints

NHTSA #12V07900028/02/2012Component: AIR BAGS:SIDE/WINDOW

NISSAN IS RECALLING CERTAIN MODEL YEAR 2003-2005 INFINITI Q45 VEHICLES. A WIRING CONNECTOR FOR THE SEAT MOUNTED AIRBAG MAY EXPERIENCE INCREASED ELECTRICAL RESISTANCE, RESULTING IN THE NON-DEPLOYMENT

Consequence

NON-DEPLOYMENT OF SIDE AIR BAGS COULD INCREASE THE RISK OF PERSONAL INJURY.

Remedy

NISSAN WILL NOTIFY OWNERS, AND DEALERS WILL MODIFY THE WIRING CONNECTOR, FREE OF CHARGE. THE SAFETY

NHTSA #04V49700013/10/2004Component: EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH

ON CERTAIN PASSENGER VEHICLES, THE BRAKE LAMP SWITCH MAY MALFUNCTION.

Consequence

IF THIS OCCURS, THE BRAKE LIGHTS WILL NOT ILLUMINATE WHEN THE BRAKE IS APPLIED, WHICH COULD RESULT I

Remedy

DEALERS WILL REPLACE THE BRAKE LAMP SWITCH. THE RECALL BEGAN ON OCTOBER 25, 2004. OWNERS SHOULD CO

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 54 technical service bulletins on file with NHTSA.

20190131Component: STRUCTURE:BODY

TL* THE CONTACT OWNS A 2004 INFINITI Q45. THE CONTACT STATED THAT THE VEHICLE'S FRAME WAS CORRODED. THE VEHICLE WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 11V244000 (STEERING, SUSPENSION). THE MANUFACTURE

20190131Component: STEERING

TL* THE CONTACT OWNS A 2004 INFINITI Q45. THE CONTACT STATED THAT THE VEHICLE'S FRAME WAS CORRODED. THE VEHICLE WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 11V244000 (STEERING, SUSPENSION). THE MANUFACTURE

20170508Component: ENGINE

TL* THE CONTACT OWNS A 2004 INFINITI Q45. THE CONTACT STATED THAT WHILE DRIVING AT 40 MPH, THE ENGINE STALLED WHILE THE SERVICE ENGINE SOON WARNING LIGHT AND ANOTHER UNKNOWN LIGHT ILLUMINATED. THE VEH

20140923Component: ENGINE

I WAS DRIVING AND DASHBOARD LIGHTS CAME ON, THEN VEHICLE CUT OFF ON THE HIGHWAY. I ASSUMED IT WAS A BAD ALTERNATOR, BUT IT WAS A DEFECTIVE CRANK SENSOR. *TR

20140923Component: STEERING

I WAS DRIVING AND DASHBOARD LIGHTS CAME ON, THEN VEHICLE CUT OFF ON THE HIGHWAY. I ASSUMED IT WAS A BAD ALTERNATOR, BUT IT WAS A DEFECTIVE CRANK SENSOR. *TR

Showing the 5 most serious of 14 complaints filed with NHTSA.

All Model Years

Other Years of the INFINITI Q45

Need a manual for a different year? Browse every INFINITI Q45 we cover.

Explore More

More INFINITI Models

Browse service and repair manuals for other INFINITI models in our catalog.