🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Generation:

WJ

Model Year:

2003

Chassis Code:

WJ

👋 Introduction

Vehicle Class:

Mid-size Luxury SUV

Jeep Brand Heritage:

Jeep is renowned for its off-road capability, ruggedness, and iconic 4x4 systems, a legacy carried through the Grand Cherokee line.

Key Competitors:

Ford Explorer, Chevrolet TrailBlazer, Toyota 4Runner, Nissan Pathfinder, BMW X5, Mercedes-Benz ML-Class.

Wj Generation Features:

Known for its refined interior, improved ride quality over previous generations, and robust powertrain options, while maintaining Jeep's signature off-road prowess.

📋 Manual Details

Manual Type:

Full Service and Repair Manual

Language:

English

Format:

Digital (likely PDF, but not explicitly stated in product info - inferring common format for these types of manuals)

📖 Manual Coverage

Engine:

Comprehensive coverage including diagnosis, repair, rebuilding, and tune-up procedures for all applicable engine variants.

Transmission:

Detailed repair, overhaul, and maintenance procedures for both automatic and manual transmissions offered.

Drivetrain:

Coverage of 4WD/AWD systems, differentials, transfer cases, axles, driveshafts, and U-joints.

Suspension Steering:

Complete information on front and rear suspension components, steering gear, power steering system, and alignment specifications.

Brakes:

In-depth coverage of hydraulic brake systems, ABS, EBD, brake diagnostics, pad/rotor replacement, caliper service, and fluid specifications.

Electrical Electronics:

Extensive wiring diagrams, troubleshooting guides for all electrical systems, including lighting, power windows, central locking, and body control modules.

Body Chassis:

Procedures for body repair, interior trim removal/installation, doors, latches, hinges, and chassis component service.

HVAC:

Service and repair of the heating, ventilation, and air conditioning systems, including refrigerant handling and component replacement.

Fuel Emissions:

Diagnosis and repair of fuel delivery systems, evaporative emission control (EVAP), catalytic converters, and exhaust systems.

Cooling System:

Service and repair of radiators, water pumps, thermostats, cooling fans, and coolant specifications.

Driver Information Systems:

Troubleshooting and repair of instrument clusters, warning lights, and onboard diagnostic systems (OBD-II).

Preventive Maintenance:

Detailed maintenance schedules, fluid changes, filter replacements, and lubrication points.

Troubleshooting:

Systematic diagnostic procedures for identifying and resolving common and complex faults using symptom-based tables.

Repair Rebuild:

Step-by-step instructions for component removal, disassembly, repair, reassembly, and installation.

Diagnostics:

Guidance on using diagnostic tools, reading trouble codes (DTCs), and performing system tests.

Specifications Tolerances:

Precise technical specifications, torque values, clearances, and dimensional data for all components.

Depth Level:

Comprehensive and in-depth, covering everything from basic fluid checks and filter replacements to complete engine and transmission overhauls, and complex electrical system diagnostics.

📊 Manual Specifications

Digital Format:

Likely PDF, featuring searchable text and high-resolution diagrams (inferred based on common product offerings).

Diagram Clarity:

High-quality, clear, and detailed diagrams, schematics, and illustrations crucial for accurate repair.

Binding Style:

N/A (Digital format)

Paper Quality:

N/A (Digital format)

Manual Completeness:

Full Service and Repair Manual, implying it covers all aspects of maintenance and repair for the specified model and year.

⚙️ Engine Specifications

Engine Options:

4.0L 'Power-Tech' Inline-6 (MPI), 4.7L 'Power-Tech' V8 (MPI)

4.0L Horsepower:

195 hp @ 4600 rpm (approx.)

4.0L Torque:

230 lb-ft @ 3200 rpm (approx.)

4.7L Horsepower:

235 hp @ 4800 rpm (approx.)

4.7L Torque:

295 lb-ft @ 3200 rpm (approx.)

Fuel Delivery:

Sequential Multi-Port Fuel Injection (MPI)

Recommended Fuel:

87 Octane Unleaded (4.0L), 89 Octane Unleaded Recommended (4.7L)

4.0L Engine Code:

AMC 242

4.7L Engine Code:

EVS V8

🔧 Transmission

Transmission Options:

45RFE 4-Speed Automatic (standard on most models), NV3500 5-Speed Manual (less common, typically with 4.0L)

Optional Transmission:

N/A for 2003 MY, primarily 45RFE Automatic

45Rfe Features:

Electronically controlled, adaptive shift logic, overdrive.

Transmission Fluid Type:

ATF+4 (MS-9602) for 45RFE automatic; Manual transmission fluid (refer to manual for specific grade, likely GL-3 or GL-4)

📐 Dimensions

Wheelbase:

116.0 inches (2946 mm)

Length:

184.9 inches (4697 mm)

Width:

74.5 inches (1892 mm)

Height:

67.4 inches (1712 mm)

Curb Weight Min:

4,216 lbs (1,912 kg) (4.0L, 2WD)

Curb Weight Max:

4,599 lbs (2,086 kg) (4.7L, 4WD, Limited)

Cargo Volume Behind 1St Row:

84.9 cu ft (2.40 m³)

Cargo Volume Behind 2Nd Row:

37.3 cu ft (1.06 m³)

🛡️ Safety Features

NHTSA Frontal Impact Driver:

4 Stars

NHTSA Frontal Impact Passenger:

4 Stars

NHTSA Side Impact Front Driver:

4 Stars

NHTSA Side Impact Front Passenger:

4 Stars

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

Available Traction Control System (TCS)

Airbags:

Standard front airbags; available side curtain airbags on some trims.

💡 Technology Features

Infotainment Systems:

Optional Infinity Gold premium audio system, CD player, cassette player, available navigation system (limited availability).

Driver Assistance Features:

ABS, optional Traction Control System (TCS).

Connectivity Options:

Power windows, power locks, remote keyless entry, available power sunroof.

🔧 Maintenance

Oil Change Interval:

Every 5,000 - 7,500 miles (8,000 - 12,000 km) or 6 months, using synthetic blend or full synthetic oil. Consult manual for specific recommendation based on driving conditions.

Transmission Fluid Change Interval:

Every 30,000 - 60,000 miles (48,000 - 96,000 km), depending on usage and manufacturer recommendation. Filter replacement recommended during service.

Coolant Flush Interval:

Every 30,000 - 100,000 miles (48,000 - 160,000 km) or 2-5 years, depending on coolant type (e.g., HOAT). Manual specifies initial change and subsequent intervals.

Spark Plug Replacement Interval:

Typically 60,000 - 100,000 miles (96,000 - 160,000 km) depending on spark plug type (e.g., platinum or iridium).

Engine Oil Capacity 4.0L:

5 Quarts (4.7 Liters) with filter change (refer to manual for exact capacity).

Engine Oil Capacity 4.7L:

6 Quarts (5.7 Liters) with filter change (refer to manual for exact capacity).

Engine Oil Specification:

SAE 5W-30 for 4.0L and 4.7L engines (check manual for temperature-dependent grades).

Coolant Specification:

Chrysler/Mopar HOAT (Hybrid Organic Acid Technology) Antifreeze/Coolant, or equivalent specification.

Common Issues Wj:

Cracked cylinder heads on 4.7L V8 (though less prevalent in later WJ models), death wobble (shimmy) in front suspension, water pump leaks, transfer case actuator failures, HVAC blower resistor failures, interior trim rattles.

📚 Vehicle History

Wj Generation Period:

1999-2004

2003 Updates:

For 2003, Jeep introduced some minor updates, including revised option packages and potentially slight interior trim enhancements. Powertrain remained largely the same.

Manufacturing Location:

Jefferson North Assembly Plant, Detroit, Michigan, USA

🏆 Awards & Recognition

Industry Awards:

The WJ Grand Cherokee generally received positive reviews for its comfortable ride and capable off-road performance for an SUV of its era. Specific awards for the 2003 model may vary but it was a solid contender in the luxury SUV segment.