🏷️ Basic Information

Make:

Infiniti

Model:

FX35 / FX45

Year:

2003

Chassis Code:

S50

👋 Introduction

Segment:

Luxury Crossover SUV

Brand Perception:

Positioned as a sporty, performance-oriented luxury SUV with a focus on driving dynamics.

Primary Competitors:

BMW X5, Mercedes-Benz ML-Class, Lexus RX series, Acura MDX.

Distinctive Features:

Distinctive styling, powerful V6 and V8 engine options, available All-Mode AWD, sporty handling for an SUV.

📋 Manual Details

Primary Coverage:

Infiniti FX35 and FX45

Model Year Coverage:

2003

Estimated Page Count:

Varies significantly based on specific sections, but factory service manuals for this era can range from 1500-3000+ pages in digital format.

Type:

Factory Service Manual / Workshop Manual / Repair Manual

Language:

English

Format:

Digital Download (PDF, potentially zipped/RAR)

📖 Manual Coverage

Engine:

VQ35DE (3.5L V6), VK45DE (4.5L V8) - diagnosis, repair, overhaul, component breakdown, timing, cooling, lubrication, fuel injection, emissions.

Transmission:

RE5R05A (5-speed automatic) - operation, diagnosis, repair, overhaul, fluid specifications, control system.

Drivetrain:

All-Mode AWD system, propeller shaft, differential (front/rear), axle shafts, hubs.

Brakes:

ABS, EBD, Brake assist, front and rear brake systems, hydraulic lines, calipers, rotors, master cylinder, power booster.

Suspension:

Front (independent, multi-link), Rear (independent, multi-link), shock absorbers, springs, control arms, bushings, alignment specifications.

Steering:

Power steering system, rack and pinion, steering column, components, fluid specifications, diagnosis.

Electrical System:

Battery, charging system (alternator), starting system (starter motor), ignition system, lighting, power windows, locks, mirrors, wipers, horn.

Body:

Exterior panels, doors, hood, tailgate, glass, interior trim, seating, body sealing, structural components, collision repair basics.

HVAC:

Air conditioning, heater, ventilation, controls, refrigerant, components, diagnosis.

Safety Systems:

Airbag system (SRS), seat belt pretensioners, diagnosis and component testing.

ECM Bcm PCM:

Engine Control Module, Body Control Module, Powertrain Control Module - diagnostic trouble codes (DTCs), component location, wiring diagrams.

Routine Maintenance:

Oil and filter changes, fluid checks and replacements, filter replacements (air, cabin), spark plug replacement, brake pad/rotor replacement.

Troubleshooting:

Diagnostic flowcharts, symptom-based troubleshooting, DTC interpretation, electrical system diagnosis.

Repair Overhaul:

Engine component repair and replacement, transmission overhaul, suspension component replacement, brake caliper/rotor replacement, drive axle repair.

Diagnostics:

OBD-II system, scan tool usage, sensor testing, actuator testing, component resistance and voltage checks.

Electrical Troubleshooting:

Wiring diagrams, circuit testing, component identification, fuse and relay testing.

Preventative Maintenance:

Scheduled maintenance tasks, inspection points, fluid type recommendations.

Depth:

Comprehensive, covering everything from basic fluid changes to full engine and transmission rebuilds, including detailed electrical schematics and diagnostic procedures.

📊 Manual Specifications

Format:

PDF (Portable Document Format)

Searchability:

Likely text-searchable if created from digital sources, or may require OCR if scanned images.

Printability:

High quality, allowing for clear printing of text and diagrams.

Binding:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Fx35 Engine:

VQ35DE

Fx35 Displacement:

3.5 Liters (3498 cc)

Fx35 Configuration:

DOHC 24-valve V6

Fx35 Horsepower:

280 hp @ 6200 rpm

Fx35 Torque:

268 lb-ft @ 4800 rpm

Fx45 Engine:

VK45DE

Fx45 Displacement:

4.5 Liters (4494 cc)

Fx45 Configuration:

DOHC 32-valve V8

Fx45 Horsepower:

315 hp @ 6000 rpm

Fx45 Torque:

315 lb-ft @ 4000 rpm

Induction:

Naturally Aspirated (Sequential Multi-port Fuel Injection)

Fuel Type:

Premium Unleaded Gasoline (91 octane or higher recommended)

🔧 Transmission

Transmission Type:

5-speed automatic (RE5R05A)

Optional Transmission:

N/A (Only automatic offered)

Transmission Features:

Electronically controlled, Adaptive Shift Control, Manual Shift Mode (Sequential Shift)

📐 Dimensions

Length:

Approx. 189.1 inches (4803 mm)

Width:

Approx. 72.7 inches (1847 mm)

Height:

Approx. 66.9 inches (1700 mm)

Wheelbase:

Approx. 112.2 inches (2850 mm)

Curb Weight:

FX35 AWD: Approx. 4,140-4,200 lbs (1878-1905 kg); FX45 AWD: Approx. 4,270-4,350 lbs (1937-1973 kg)

Cargo Volume:

Approx. 24.8 cu ft (behind rear seats), expandable to approx. 64.5 cu ft (with rear seats folded)

🛡️ Safety Features

NHTSA Front Crash Test:

Not consistently rated for 2003 models, but generally performed well for its class.

IIHS Front Crash Test:

Good (for models tested in later years reflecting similar design).

Active Safety Features:

Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD), Brake Assist, Traction Control System (TCS), Vehicle Dynamic Control (VDC).

Passive Safety Features:

Front airbags, front side-impact airbags, front and rear side curtain airbags, three-point seat belts with pretensioners, active head restraints.

💡 Technology Features

Infotainment Features:

Available premium audio system (Bose), CD player, optional navigation system, available rear-seat entertainment.

Driver Assistance Features:

Traction Control System (TCS), Vehicle Dynamic Control (VDC), intelligent key with push-button ignition, optional rearview monitor.

Connectivity Options:

Limited by modern standards; primarily analog audio inputs.

🔧 Maintenance

Oil Change Interval:

Every 5,000 miles or 6 months, whichever comes first, under normal driving conditions. Check manual for severe driving conditions.

Transmission Fluid Interval:

Inspect every 30,000 miles. Replace every 60,000 miles or as per severe service schedule. Consult manual for specific fluid type.

Engine Air Filter Replacement:

Inspect every 15,000 miles, replace as needed or at least every 30,000 miles.

Cabin Air Filter Replacement:

Inspect every 15,000 miles, replace annually or as needed.

Engine Oil Type:

SAE 5W-30 Synthetic (API SM or higher, ILSAC GF-4)

Engine Oil Capacity:

VQ35DE: Approx. 4.8 US quarts (4.5 liters) with filter; VK45DE: Approx. 5.9 US quarts (5.6 liters) with filter

Transmission Fluid Type:

Nissan Matic J (or equivalent ATF)

Power Steering Fluid:

Nissan PSF (Power Steering Fluid) or Dexron III/Mercon ATF

Coolant Type:

Nissan Genuine Super Coolant (Blue) or equivalent P-OAT coolant

Common Wear Items:

Front suspension bushings and ball joints (can lead to clunking noises and alignment issues), ignition coils (VQ35DE), mass air flow sensor (MAF), oil pressure sending unit.

Transmission Note:

While generally robust, some owners have reported issues with the RE5R05A transmission if maintenance is neglected, particularly with overheating and fluid degradation.

📚 Vehicle History

Brand Origin:

Infiniti is the luxury vehicle division of Japanese automaker Nissan, established in 1989.

First Generation Launch:

The Infiniti FX series (first generation, S50) was introduced for the 2003 model year, designed to compete in the growing luxury SUV market with a focus on performance and distinctive styling.

Fx Design Philosophy:

The FX was characterized by its 'coupe-like' styling, muscular stance, and performance-oriented chassis, setting it apart from more traditional SUV designs.

Manufacturing Location:

a n d j u s t o n e a t h e m a n u a l s w h i c h a r e s e t u p t o h e l p y o u w i t h i t .

🏆 Awards & Recognition

Automotive Press Reviews:

The FX35/FX45 received generally positive reviews for its distinctive styling, athletic handling, and powerful engines, though critics sometimes pointed to a firmer ride and less practical interior space compared to competitors.