1999 INFINITI Q45 Service and Repair Manual

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Covers all 1999 Q45 trims — T Sedan 4-Door, Base Sedan 4-Door ·
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1999 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

  • T Sedan 4-Door
  • Base Sedan 4-Door

Engines covered

  • 4.1L 4130CC 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
No active recalls The 1999 INFINITI Q45 has no recalls on file with NHTSA.
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 #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 #10232644

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

TSB #10190150

INFINITI; FRONT SONAR PARKING SENSOR SERVICE INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.

TSB #10051765

INFINITI: LOCK/UNLOCK REQUEST BUTTON ON OUTSIDE DOOR HANDLE OUTSIDE DOOR HANDLE DOES NOT RESPOND. LOCK/UNLOCK REQUEST BUTTON LOCATED ON OUTSIDE DOOR HANDLES OF VEHICLES CAN BE DISABLED (OR ENABLED) THROUGH EITHER THE "COMFORT & CONV" SETTIN

TSB #10044526

INFINITI: REPROGRAMMING ELECTRONIC CONTROL UNIT (ECU) ON ALL QUALIFYING VEHICLES. NO MODELS LISTED. MODEL YEARS 1998-2013. *PE

TSB #10032524

INFINITI: VENT CONTROL VALVE REPLACEMENT. NO APPLIED VEHICLES AFFECTED: ALL MODELS; NO MODEL YEARS LISTED. *PE

TSB #10032305

INFINITI: SRS PRECAUTIONS DURING SERVICE. INCLUDED IN THE RESTRAINTS SECTION OF THE ELECTRONIC SERVICE MANUAL (ESM) FOR EACH VEHICLE IS INFORMATION NECESSARY TO SERVICE THE SUPPLEMENTAL RESTRAINT SYSTEM (SRS) SAFELY. IMPROPER MAINTENANCE, I

Showing the 8 most recent of 45 technical service bulletins on file with NHTSA.

20050907Component: TIRESCrash reported1 injured

MY CAR A 1999 INFINITI Q45 HAS 4 CONTINENTAL TIRES. THESE WERE PURCHASED LAST YEAR AND HAS BEEN USED FOR ABOUT 6000 MILES. ON TUESDAY AUGUST 30 THE RIGHT REAR TIRE BLEW OUT CAUSING THE VEHICLE TO SLI

20140409Component: SUSPENSIONCrash reported

LEFT FRONT STRUT SPRING BROKE WHILE IN TRAFFIC, SENDING BROKEN SPRING END INTO TIRE RIPPING THE ENTIRE SIDEWALL OF THE TIRE OUT. BLOWOUT CAUSED LOSS OF STEERING WHILE IN THE PROCESS SENT VEHICLE INTO

20140409Component: STEERINGCrash reported

LEFT FRONT STRUT SPRING BROKE WHILE IN TRAFFIC, SENDING BROKEN SPRING END INTO TIRE RIPPING THE ENTIRE SIDEWALL OF THE TIRE OUT. BLOWOUT CAUSED LOSS OF STEERING WHILE IN THE PROCESS SENT VEHICLE INTO

20070508Component: STRUCTURE:BODY:HOOD:HINGE AND ATTACHMENTS

WHILE CHECKING THE OIL IN THE 1999 Q45 INFINITI THE HOOD SUDDENLY FELL AND SLAMMED CLOSED. THIS HAPPENED IN JANUARY 2007 ,AND AGAIN MARCH 2007. ALL THREE TIMES I HAD TURNED AWAY MOMENTARILY AND WAS N

20060802Component: TIRES

DT*: THE CONTACT STATED THE DRIVER'S SIDE REAR TIRE BLEW OUT WHILE DRIVING ON THE FREEWAY AT 20 MPH. THE CONTACT STATED THE TIRES WERE MAINTAINED WELL AT 35PSI. THERE WERE NO PROBLEMS WITH THE STEER

Showing the 5 most serious of 10 complaints filed with NHTSA.

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