2003 Infiniti Q45 Service & Repair Manual Software

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🏷️ Basic Information Identification Make: Infiniti Model: Q45 Year: 2003 Generation Generation Designation: F50 Generation Years: 2001-2006 Codes Chassis Code: F50 👋 Introduction Market Position Segment: Full-size luxury sedan Target...

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Type: Car

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Sku: 195778

Tags: 2003 Car Cars Infiniti Q Models Q45

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Description

🏷️ Basic Information

Identification

Make:

Infiniti

Model:

Year:

Generation

Generation Designation:

Generation Years:

2001-2006

Codes

Chassis Code:

👋 Introduction

Market Position

Segment:

Full-size luxury sedan

Target Audience:

Affluent consumers seeking premium comfort, performance, and advanced technology

Competitive Analysis

Key Competitors:

Lexus LS, Mercedes-Benz S-Class, BMW 7 Series, Audi A8, Cadillac DeVille/DTS

Key Features

Vehicle Highlights:

Powerful V8 engine, sophisticated suspension, luxurious interior, advanced technology features for its era, comfortable ride

Manual Value Proposition

Diy Benefit:

Enables do-it-yourself repairs and maintenance, saving significant costs associated with dealership or independent shop labor.

Accuracy And Reliability:

Licensed OE information ensures accuracy and reliability for all repair and maintenance procedures.

Convenience:

Instant online access across multiple devices, eliminating the need for physical storage or searching through bulky printed manuals.

📋 Manual Details

Coverage Areas

Primary Coverage:

Comprehensive Service and Repair

Secondary Coverage:

Maintenance, Diagnostics, Troubleshooting, Wiring Diagrams

Page Count

Estimated Pages:

Extensive (Digital Format - Varies by Session/Search)

Manual Type

Type:

Official Factory Service Manual (Digital Software)

Language

Language:

English

Format

Format Type:

Online Software/Web-Based Access

Access Method:

Internet Connection and Web Browser

Device Compatibility:

PC, Laptop, Smartphone, Tablet

Licensing

Licensing Status:

Officially Licensed

Source Material:

OE (Original Equipment) Materials

Access Duration

Subscription Period:

1 Year

Renewal Options:

Discounts available for additional years

📖 Manual Coverage

Systems Covered

Powertrain:

Engine mechanical, engine management, lubrication, cooling, fuel, exhaust, ignition, automatic transmission (5-speed RE4R01A/RE4R01B variations), drivetrain components (driveshaft, differential, axles)

Chassis:

Suspension (front and rear), steering system (power steering, steering rack, linkages), brakes (ABS, EBD, brake system components, hydraulic circuits)

Body And Exterior:

Body panels, doors, windows, mirrors, exterior trim, lighting, wipers, locks

Interior:

Seats, upholstery, interior trim, airbags, seat belts, climate control system (HVAC), audio system, instrumentation, switches

Electrical:

Battery, charging system, starting system, lighting circuits, power windows, power locks, wipers, horn, audio system, instrument cluster, ECUs, Body Control Module (BCM), comprehensive wiring diagrams

Climate Control:

Air conditioning (R134a system), heating, ventilation, blower motor, HVAC controls, refrigerant handling and service

Safety Systems:

Airbag system (SRS), ABS, traction control (TCS), electronic stability control (VDC)

Procedures Included

Routine Maintenance:

Oil change, filter replacement, fluid checks and top-offs, tire rotation, spark plug replacement, belt inspection and replacement

Major Repairs:

Engine component overhaul, transmission removal and rebuild, brake caliper and rotor replacement, suspension arm and shock absorber replacement, steering rack replacement

Diagnostics:

Troubleshooting guides, symptom-based diagnosis, DTC (Diagnostic Trouble Code) interpretation, component testing procedures

Electrical Troubleshooting:

Wiring diagram interpretation, circuit testing, component diagnosis (sensors, actuators, ECUs)

Component Replacement:

Detailed instructions for replacing specific parts like alternators, starters, fuel pumps, ignition coils, radiators, etc.

Torque Specifications:

Precise torque values for all critical fasteners

Special Tools:

Identification and usage of required special tools for specific repairs

Technical Depth

Depth Level:

Factory-level detail for professional technicians and advanced DIYers

Diagnostic Complexity:

Advanced diagnostic procedures including scan tool data interpretation and waveform analysis (where applicable)

Rebuild Procedures:

Comprehensive rebuild instructions for major components like engines and transmissions

📊 Manual Specifications

File Format

Primary Format:

Web-based application

Data Structure:

Searchable database with integrated diagrams and illustrations

Print Quality

Print Option:

Pages can be printed from the web interface

Binding Type

Binding Type:

Not Applicable (Digital)

Paper Type

Paper Type:

Not Applicable (Digital)

⚙️ Engine Specifications

Primary Engine

Engine Code:

VQ35DE (3.5L V6 DOHC)

Engine Type:

Naturally Aspirated V6

Displacement:

3.5 Liters (3498 cc)

Bore X Stroke:

95.5 mm x 81.4 mm

Compression Ratio:

9.1:1

Valve Train:

DOHC, 4 valves per cylinder (24 valves total), VVT (Variable Valve Timing)

Performance

Horsepower:

240 HP @ 6200 RPM

Torque:

258 lb-ft @ 4800 RPM

Fuel System

Fuel Delivery:

Sequential Multi-port Fuel Injection (SFI)

Fuel Type:

Premium Unleaded Gasoline (91 Octane or higher recommended)

Fuel Tank Capacity:

20.0 Gallons (75.7 Liters)

Engine Management

ECU Type:

Engine Control Unit (ECU) with OBD-II diagnostics

🔧 Transmission

Standard

Transmission Type:

5-Speed Automatic with Manual Shift Mode (Sport Shift)

Transmission Code:

RE4R01A / RE4R01B (depending on specific VIN/market)

Optional

Optional Transmission:

N/A for 2003 model year

Features

Transmission Features:

Electronically controlled, adaptive shift control, Snow mode

Fluid Specifications

Transmission Fluid Type:

Nissan Matic J (or equivalent Dexron-III/Mercon)

Fluid Capacity

Transmission Fluid Capacity:

Approximately 9.5 US quarts (9.0 Liters) for complete refill

📐 Dimensions

Exterior

Length:

197.0 inches (5004 mm)

Width:

71.5 inches (1816 mm)

Height:

58.7 inches (1491 mm)

Wheelbase:

113.4 inches (2880 mm)

Front Track:

60.8 inches (1545 mm)

Rear Track:

60.6 inches (1539 mm)

Weights

Curb Weight:

Approximately 3,700 - 3,800 lbs (1678 - 1724 kg)

Gross Vehicle Weight Rating Gvwr:

Approximately 4,800 lbs (2177 kg)

Payload Capacity:

Approximately 1,000 - 1,100 lbs

Towing Capacity:

Not Recommended/Specified by Manufacturer

🛡️ Safety Features

Ratings

NHTSA Front Impact Driver:

Not explicitly rated by NHTSA for this specific year/model in easily accessible public records, but generally considered good for its class.

NHTSA Front Impact Passenger:

Not explicitly rated by NHTSA for this specific year/model in easily accessible public records, but generally considered good for its class.

IIHS Frontal Offset:

Good (for 2002-2004 model years)

Active Features

Active Safety Features:

Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD), Vehicle Dynamic Control (VDC - Traction and Stability Control)

Passive Features

Passive Safety Features:

Driver and front passenger front airbags, front side-impact airbags, front and rear curtain airbags, pretensioner seatbelts with load limiters, active head restraints (driver's side)

💡 Technology Features

Infotainment

Infotainment System:

Bose premium audio system, navigation system (optional), CD player, cassette player

Display:

Color LCD display for navigation and vehicle information

Driver Assistance

Driver Assistance Features:

Cruise control, parking sensors (optional/rear), keyless entry and start (Intelligent Key)

Connectivity

Connectivity Features:

Limited by era, primarily analog connectivity for audio, no Bluetooth or USB natively.

🔧 Maintenance

Service Intervals

Oil And Filter Change:

Every 5,000 - 7,500 miles (8,000 - 12,000 km) or 6 months, whichever comes first (using synthetic oil).

Engine Air Filter:

Inspect every 15,000 miles (24,000 km), replace as needed or every 30,000 miles (48,000 km).

Cabin Air Filter:

Inspect every 15,000 miles (24,000 km), replace as needed or every 30,000 miles (48,000 km).

Spark Plugs:

Iridium-tipped spark plugs: Replace every 100,000 miles (160,000 km).

Transmission Fluid Service:

Inspect at 30,000 miles (48,000 km), drain and refill at 60,000 - 80,000 miles (96,000 - 128,000 km) or under severe conditions.

Coolant Flush:

First flush at 105,000 miles (168,000 km), then every 60,000 miles (96,000 km) thereafter.

Brake Fluid:

Flush and replace every 30,000 miles (48,000 km) or 2 years.

Fluid Specifications

Engine Oil Type:

SAE 0W-20 or 5W-30 Synthetic (API certified)

Engine Oil Capacity:

5.1 US quarts (4.8 Liters) with filter change

Coolant Type:

Nissan Genuine Super Long Life Coolant (Blue) or equivalent Asian vehicle antifreeze

Power Steering Fluid:

Nissan Genuine PSF or equivalent Dexron-III/Mercon

Known Issues

Engine Oil Consumption:

Some VQ35DE engines can exhibit increased oil consumption with age and mileage; requires regular checks and potential PCV valve replacement or internal inspection.

Transmission Hard Shifting:

Can occur due to worn solenoids or internal wear; fluid and filter changes often help, but full rebuild may be necessary.

Power Steering Pump Noise:

Leaking or failing power steering pumps can cause whining noises, especially at full lock or low fluid levels.

HVAC Blend Door Actuators:

Malfunctioning blend door actuators can lead to incorrect air temperature or distribution within the cabin.

Catalytic Converter Failure:

Can occur due to rich fuel mixture or internal engine issues, leading to reduced power and check engine light.

Front Suspension Wear:

Ball joints, tie rod ends, and control arm bushings can wear over time, causing clunking noises and poor alignment.

📚 Vehicle History

Brand Heritage

Infiniti Mission:

Nissan's luxury division, established in 1989, aiming to compete with established European luxury brands through performance, technology, and customer service.

Model Evolution

Q45 First Generation:

Introduced in 1990 (G50) as Infiniti's flagship, featuring a powerful V8 and innovative technology like Active Suspension.

Q45 Second Generation:

Introduced in 1997 (G51), transitioned to a V8 and a more traditional luxury sedan design, but struggled to regain market momentum.

Q45 Third Generation:

Introduced in 2001 (F50), this generation adopted the VQ35DE V6 engine for improved efficiency and performance, featuring a new platform and styling.

Production

Production Years:

2001-2006

Manufacturing Location:

Japan (Multiple Nissan/Infiniti Plants)

Sales Performance:

Sales declined significantly in its later years, leading to its discontinuation after the 2006 model year.

🏆 Awards & Recognition

Recognitions

Automotive Journalist Awards:

While not a primary award winner, it was generally well-regarded for its luxury appointments and comfortable ride in comparison to its segment competitors during its release.

Ratings

Consumer Reports Reliability:

Varied over its production run, with some model years receiving average or below-average reliability ratings, particularly concerning electronic components and powertrain longevity.