🏷️ Basic Information

Make:

Isuzu

Model:

I-370

Year:

2007

Chassis Code:

UCF30 (shared with Toyota Celsior/Lexus LS430 platform basis)

Engine Code:

VQ37VHR (Rebadged Nissan VQ37VHR, though typically referred to by Isuzu designation or engine displacement)

👋 Introduction

Target Audience:

DIY enthusiasts, independent repair shops, and Isuzu owners seeking reliable repair information

Advantage:

Online format offers superior convenience, searchability, and up-to-date information compared to outdated printed manuals

Delivery Method:

Instant online access upon purchase

📋 Manual Details

Systems Covered:

Engine, Transmission, Drivetrain, Brakes, Suspension, Steering, HVAC, Electrical Systems, Bodywork, Maintenance, Diagnostics, Troubleshooting, Wiring Diagrams

Estimated Page Count:

Extensive digital content, equivalent to several hundred printed pages

Type:

Service and Repair Manual Software

Language:

English

Format:

Online Software/Web-based Access

📖 Manual Coverage

Engine:

3.7L V6 (VQ37VHR), including maintenance, diagnosis, disassembly, assembly, and overhaul

Transmission:

Automatic Transmission (likely a variant of Jatco RE5R05A), including service, diagnostics, and repair

Drivetrain:

Rear-Wheel Drive (RWD) components, including driveshaft, differential, and axles

Brakes:

Front and Rear Brake systems (disc), including inspection, service, component replacement, and bleeding procedures

Suspension:

Front and Rear Suspension systems (likely double wishbone front, multi-link rear), including component inspection, replacement, and alignment specifications

Steering:

Power Steering system, including diagnosis and component service

HVAC:

Heating, Ventilation, and Air Conditioning (HVAC) systems, including diagnosis, refrigerant service, and component replacement

Electrical:

Complete electrical system, including battery, starting, charging, lighting, power accessories, and integrated control modules. Detailed wiring diagrams included.

Bodywork:

Body panel removal and installation, interior trim, glass replacement, and associated hardware

Maintenance:

Scheduled maintenance, fluid changes (oil, coolant, brake fluid, transmission fluid), filter replacements, tune-ups, and inspections

Troubleshooting:

Diagnostic procedures for common drivability issues, electrical faults, and system malfunctions, often with flowcharts and symptom-based troubleshooting guides

Repair:

Step-by-step instructions for component removal, repair, and reinstallation for all major vehicle systems

Diagnostics:

OBD-II diagnostic trouble code (DTC) interpretation, sensor data analysis, and testing procedures for control modules

Depth:

Comprehensive, covering basic maintenance to complete engine and transmission rebuilds, including detailed torque specifications and clearance measurements

📊 Manual Specifications

Accessibility:

Web-based, accessible via browser on PC, laptop, smartphone, tablet

Digital Quality:

High-resolution text and diagrams, searchable content

Access Period:

1-year subscription, with renewal discounts available

Licensing:

Officially licensed, derived from OE (Original Equipment) materials

⚙️ Engine Specifications

Engine Type:

3.7L DOHC 24-valve V6

Bore X Stroke:

Approximately 95.5 mm x 86.0 mm (based on VQ37VHR data)

Displacement:

3696 cc (3.7 Liters)

Compression Ratio:

Approximately 10.4:1 (based on VQ37VHR data)

Horsepower:

Estimated 235-245 hp @ 5800 rpm (varies by specific tuning)

Torque:

Estimated 269-275 lb-ft @ 4800 rpm (varies by specific tuning)

Induction Type:

Multi-port Fuel Injection (MPI)

Fuel Type:

Unleaded Gasoline (87 Octane recommended)

ECU:

Engine Control Unit (ECU) with comprehensive sensor monitoring and diagnostic capabilities

🔧 Transmission

Type:

5-Speed Automatic Transmission

Type:

Not Applicable (5-speed auto was standard)

Drive Modes:

Standard P-R-N-D-L, likely with manual shift mode

Atf Type:

Dexron-III or equivalent automatic transmission fluid (verify with specific vehicle service data)

Capacity:

Approximately 8.8 - 9.2 Liters (check specific fill procedure)

📐 Dimensions

Wheelbase:

Approximately 112.2 inches (2850 mm)

Length:

Approximately 193.7 inches (4920 mm)

Width:

Approximately 70.9 inches (1800 mm)

Height:

Approximately 57.3 inches (1455 mm)

Curb Weight:

Approximately 3600-3800 lbs (1633-1724 kg), depending on configuration

Gross Vehicle Weight Rating:

Typically around 4700-4900 lbs (2132-2223 kg)

Trunk Volume:

Approximately 15.0 - 16.0 cubic feet (425 - 453 Liters)

🛡️ Safety Features

NHTSA Front Impact:

Likely 4-star or 5-star (based on similar platform vehicles of the era)

NHTSA Side Impact:

Likely 4-star or 5-star (based on similar platform vehicles of the era)

IIHS Crash Test Ratings:

Good in frontal and side impact tests for comparable models

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

Standard Traction Control System (TCS)

Electronic Stability Control:

Likely standard Electronic Stability Control (ESC) or Vehicle Stability Control (VSC)

Airbags:

Frontal airbags, side-impact airbags, and side curtain airbags

Seatbelts:

3-point seatbelts with pretensioners and load limiters

Child Anchors:

LATCH (Lower Anchors and Tethers for Children) system

💡 Technology Features

Audio System:

Premium audio system, likely with CD player, AM/FM radio, and possibly a premium brand speaker system (e.g., Bose)

Navigation:

Optional factory navigation system

Cruise Control:

Standard Cruise Control

Parking Sensors:

Optional rear parking assist sensors

Auxiliary Input:

Likely equipped with an auxiliary audio input jack

🔧 Maintenance

Oil Change Interval:

Every 5,000-7,500 miles or 6 months, whichever comes first (using synthetic oil recommended)

Coolant Change Interval:

Initial change at 100,000 miles, then every 50,000 miles or 5 years

Transmission Fluid Change:

Inspect every 30,000 miles, replace as needed or at 60,000-100,000 miles

Spark Plug Replacement:

Approximately 100,000 miles (depending on spark plug type, e.g., iridium)

Engine Oil:

SAE 5W-30 Synthetic (API SN or newer recommended)

Engine Oil Capacity:

Approximately 5.0 - 5.5 Quarts (4.7 - 5.2 Liters) with filter change

Coolant Type:

Toyota Super Long Life Coolant (SLLC) - Pink or equivalent Asian vehicle long-life coolant

Brake Fluid:

DOT 3 or DOT 4 (verify in owner's manual)

Common Problems:

Potential for minor electrical gremlins, wear on suspension components (bushings, ball joints) due to mileage, and occasional HVAC system issues. The VQ series engine is generally robust.

Original Tire Size:

Commonly 225/55R17 or 225/50R18 (verify specific trim)

Bolt Pattern:

5x114.3 mm (5x4.5 inches)

Center Bore:

60.1 mm

📚 Vehicle History

Company Focus:

Isuzu has a long history of producing trucks, commercial vehicles, and diesel engines, with a reputation for durability and reliability.

Origins:

The I-370 was essentially a rebadged and slightly restyled version of the Japanese market Toyota Crown Majesta, utilizing a platform shared with the Lexus LS430. This arrangement was part of a strategic alliance between Isuzu and Toyota.

Production Period:

The I-370 was produced for a limited period, primarily focusing on the North American market as Isuzu shifted its passenger vehicle strategy.

Manufacturing Location:

Likely assembled in Japan, leveraging Toyota's manufacturing capabilities.

🏆 Awards & Recognition

Vehicle Awards:

As a rebadged Toyota platform, it inherited the quality and refinement associated with Toyota's luxury vehicles of the era. While not independently awarded as an 'Isuzu I-370', its Toyota underpinnings suggest a high standard of build and design.