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Infiniti

Infiniti Qx4 2001-2003 Service Repair Manual

Infiniti Qx4 2001-2003 Service Repair Manual

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$16.99
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Vehicle data plateRef 207372
Brand
Infiniti
Vehicle
Cars
Models covered
QX Models, QX4
Years
2001, 2002, 2003
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

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🏷️ Basic Information
Identification
Make:
Infiniti
Model:
QX4
Model Years Covered:
2001, 2002, 2003
Vehicle Type:
Luxury Mid-size SUV
Codes
Platform Code:
R50 (Nissan Pathfinder platform)
👋 Introduction
Market Position
Segment:
Luxury Mid-size SUV, often cross-shopped with Lexus RX, Acura MDX, and BMW X5 of the era.
Competitive Analysis
Differentiation:
Offered a comfortable, refined ride with a standard V6 engine and available 4WD, leveraging Nissan's proven truck and SUV platform (shared with Pathfinder).
Key Features
Engine Powertrain:
3.5L VQ35DE V6 engine and available ATTESA E-TS All-Mode 4WD system provided capable performance.
Luxury Appointments:
Premium interior materials, leather seating, Bose audio system, and available navigation were hallmarks of its luxury positioning.
📋 Manual Details
Coverage Areas
Primary Coverage:
Service and Repair
Secondary Coverage:
Maintenance, Troubleshooting, Diagnostics, Electrical Systems, Component Overhaul
Page Count
Estimated Page Count:
Over 2000 pages (typical for comprehensive factory service manuals)
Manual Type
Type:
Factory Service Manual / Repair Manual
Language
Language:
English
Format
File Format:
PDF
Delivery Method:
Digital Download
📖 Manual Coverage
Systems Covered
Engine Mechanical:
Engine assembly, cylinder head, valve train, pistons, connecting rods, crankshaft, oil pump, lubrication system, cooling system, timing system (chain/belt), engine diagnostics.
Engine Management:
ECM (Engine Control Module), fuel injection, ignition system, sensors (MAF, O2, crank, cam, knock), actuators, emissions control (EGR, PCV), OBD-II diagnostics.
Transmission Automatic:
RE4R01A (4-speed automatic): Hydraulic control, torque converter, planetary gear sets, valve body, solenoids, transmission control module (TCM), servicing, overhaul, diagnostics, fluid specifications.
Transmission Manual:
RM01A (5-speed manual): Gearbox assembly, clutch operation, linkages, servicing, overhaul, fluid specifications.
Drivetrain Transfer Case:
ATTESA E-TS (All-Mode Four-Wheel Drive): Operation, components, servicing, diagnostics, fluid specifications.
Drivetrain Axles Suspension:
Front and rear suspension components (struts, shocks, springs, control arms, bushings), steering knuckles, wheel bearings, CV joints, drive shafts, differential service (front/rear), hub units, alignment specifications.
Brakes:
Front and rear brake systems (disc brakes), ABS (Anti-lock Braking System), EBD (Electronic Brakeforce Distribution), hydraulic lines, calipers, rotors, pads, parking brake, bleeding procedures, specifications.
Steering:
Power steering system, steering rack, pump, hoses, fluid specifications, steering column components, adjustments.
Electrical Body:
Wiring diagrams, exterior and interior lighting, power windows, door locks, mirrors, seats, sunroof, wipers, washers, horn, keyless entry, alarm system, interior trim removal, body panel repair.
Electrical Chassis:
Instrument cluster, gauges, warning lights, audio system, navigation system (if equipped), cruise control, multiplex communication (CAN bus), fuse box locations, relay functions.
Safety Restraint:
Airbag system (SRS), seat belt pre-tensioners, occupant classification system, diagnostic procedures for SRS.
HVAC:
Air conditioning system (compressor, condenser, evaporator, refrigerant), heater core, blower motor, climate control unit, diagnostic procedures, refrigerant charging specifications.
Fuel System:
Fuel tank, fuel pump, fuel filter, fuel injectors, fuel lines, fuel pressure testing, evaporative emissions control (EVAP).
Emissions Control:
Catalytic converter, EGR valve, PCV system, oxygen sensors, secondary air injection system, emission control components and diagnostics.
Procedures Included
Maintenance:
Scheduled maintenance items (oil changes, filter replacements, fluid checks/changes, spark plugs, belts, hoses, brake checks), lubrication points.
Diagnostics Troubleshooting:
Step-by-step troubleshooting flowcharts for common and uncommon issues, symptom-based diagnostics, DTC (Diagnostic Trouble Code) interpretation.
Repair Overhaul:
Complete disassembly and reassembly procedures for all major components and systems, torque specifications for critical fasteners, special tool requirements.
Electrical Diagnostics:
Detailed wiring diagrams, component testing procedures, voltage and resistance checks, signal tracing.
Special Tools:
Identification and use of specialized tools required for specific repairs (e.g., press tools, alignment equipment, diagnostic scanners).
Technical Depth
Depth:
Comprehensive (from basic maintenance to complete engine and transmission rebuilds, including complex electrical diagnostics).
Detail Level:
Factory-level detail with substeps, notes, cautions, and warnings for critical procedures.
📊 Manual Specifications
File Format
Quality:
High-resolution PDF, searchable text, vector graphics for diagrams.
Print Quality
Printability:
Fully printable on standard printers, with options for individual page printing or sections.
Binding Type
Binding:
N/A (Digital Download - No physical binding)
Paper Type
Paper Type:
N/A (Digital Download - No physical paper)
Software Requirements
Reader Requirement:
Adobe Acrobat Reader (or compatible PDF viewer)
Compression Requirement:
WinZip (or compatible file archiver for initial download)
⚙️ Engine Specifications
Primary Engine
Engine Code:
VQ35DE
Engine Type:
3.5L (3498cc) DOHC 24-valve V6
Bore X Stroke:
95.5 mm x 81.4 mm
Compression Ratio:
9.7:1
Performance
Horsepower:
240 hp @ 6000 rpm (approx.)
Torque:
265 lb-ft @ 3200 rpm (approx.)
Fuel System
Fuel Delivery:
Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded gasoline, 87 octane recommended
Lubrication
Oil Capacity:
4.8 US quarts (4.5 liters) with filter change (VQ35DE)
Oil Specification:
API SG or higher, SAE 5W-30 or 10W-30 viscosity (refer to manual for exact seasonal recommendations)
🔧 Transmission
Standard
Type:
4-speed Automatic (RE4R01A)
Optional
Type:
5-speed Manual (RM01A)
Features
4Wd System:
ATTESA E-TS (All-Mode Four-Wheel Drive) with electronic torque split control
Fluid Specification
Automatic Transmission Fluid:
Nissan Matic Fluid J or equivalent DEXRON III/MERCON
Manual Transmission Fluid:
API GL-4 or GL-5, SAE 75W-85 or 75W-90 viscosity
📐 Dimensions
Exterior
Wheelbase:
111.2 inches (2824 mm)
Length:
189.1 inches (4803 mm)
Width:
71.7 inches (1821 mm)
Height:
65.7 inches (1669 mm)
Weights
Curb Weight:
4100 - 4300 lbs (approx., depending on drivetrain and options)
Cargo
Cargo Volume:
37.1 cu ft (behind rear seats), 79.8 cu ft (with rear seats folded)
🛡️ Safety Features
Ratings
NHTSA Frontal Crash:
5-Star Driver and Passenger (for relevant model years, check specific year ratings)
IIHS Side Impact:
'Acceptable' or 'Good' depending on year and specific test configurations (check IIHS archives).
Active Features
ABS:
Standard Anti-lock Braking System
Traction Control:
Available Traction Control System (TCS) on some models.
Passive Features
Airbags:
Front dual-stage airbags, available front side-impact airbags.
Seat Belts:
3-point front and rear seat belts, front seat belt pre-tensioners.
💡 Technology Features
Infotainment
Audio System:
Available Bose premium audio system with CD player and AM/FM radio.
Navigation:
Optional factory DVD-based navigation system.
Driver Assistance
Cruise Control:
Standard cruise control.
Connectivity
Multiplex Communication:
Utilizes a multiplex wiring system (akin to early CAN bus) for various control modules, detailed in the electrical section.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 3,750 miles or 3 months for severe service, 7,500 miles or 6 months for normal service (refer to owner's manual for specific recommendations and oil type).
Engine Air Filter:
Inspect every 15,000 miles, replace as needed. Replace every 30,000 miles or sooner if dirty.
Spark Plugs:
Platinum-tipped plugs typically have a 100,000-mile replacement interval. Iridium plugs could have a longer interval. Consult manual for exact type and interval.
Transmission Fluid Change:
Every 30,000-60,000 miles, depending on driving conditions (severe vs. normal service). Check manual for specific recommendations.
Coolant Change:
Initial change at 30,000 miles or 2 years, then every 30,000 miles or 2 years thereafter. Use Nissan Genuine Super Long Life Coolant (Blue).
Fluid Specifications
Brake Fluid:
DOT 3
Power Steering Fluid:
Nissan Genuine Power Steering Fluid or equivalent DEXRON II/III ATF.
Differential Fluid:
API GL-5, SAE 80W-90 gear oil for both front and rear differentials.
Known Issues
Intake Manifold Gasket Leaks:
Common on the VQ35DE engine, can cause coolant or vacuum leaks.
Transfer Case Actuator Failure:
The electronic actuator for the ATTESA E-TS system can fail, leading to 4WD system faults.
Oil Cooler Hose Leaks:
O-rings and hoses for the engine oil cooler can degrade and leak.
Cv Joint Boots:
Ruptured CV joint boots can lead to premature wear and failure of the joints.
Window Regulator Failure:
Power window regulators can wear out and fail.
📚 Vehicle History
Brand Heritage
Infiniti Launch:
Infiniti was launched by Nissan in 1989 as a luxury brand in North America.
Model Evolution
Qx4 Introduction:
The QX4 was introduced for the 1997 model year, based on the second-generation Nissan Pathfinder (R50).
Model Updates 01-03:
The 2001 model year brought significant updates, including the new 3.5L VQ35DE engine and styling revisions. Later models in this range (2002-2003) saw minor equipment shuffling and refinements.
Production
Manufacturing Location:
Japan (primarily)
🏆 Awards & Recognition
Recognitions
Jd Power Initial Quality:
Infiniti models frequently ranked well in J.D. Power Initial Quality studies during this period, reflecting Nissan's quality improvements.
Ward Auto Engines:
The VQ35DE engine was a consistent recipient of Ward's 10 Best Engines awards.

Delivery & file format

This is a digital PDF download, not a printed book. After payment the download link appears on your order confirmation page and is emailed to the address you entered. Files open in any PDF reader on phone, tablet or computer and can be printed.

Check the model year and engine before you buy

Manufacturers change procedures, wiring and part numbers between model years and engine options. If your VIN plate shows a year or engine code that is not listed on the data plate above, contact us with the model, year and VIN and we will confirm coverage before you order.

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