🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Year:

2003

Platform:

WJ/WG

Chassis Code:

WJ

Chassis Code Diesel:

WG

👋 Introduction

Vehicle Segment:

Mid-size Luxury SUV

Target Audience:

Families, off-road enthusiasts, those seeking comfort and capability

Primary Competitors 2003:

Ford Explorer, Toyota 4Runner, Chevrolet TrailBlazer, Nissan Pathfinder, Land Rover Discovery

Key Selling Points:

Robust chassis, available powerful engines (including the Mercedes-Benz-derived diesel), legendary Jeep off-road capability (Quadra-Drive II system), comfortable interior, towing capacity

📋 Manual Details

Manual Type:

Service, Diagnostic, and Parts Lists

Language:

English

Format:

PDF (11 files)

Estimated Total Pages:

Likely exceeds 2000 pages across 11 files (specific page count per file not provided)

📖 Manual Coverage

Powertrain:

Engine (both gasoline and diesel variants), Transmission (automatic and manual where applicable), Drivetrain (4x4 systems, differentials)

Chassis:

Suspension (front and rear), Steering, Brakes (hydraulic, ABS), Wheels and Tires

Electrical:

Engine Control Module (ECM), Body Control Module (BCM), Lighting, Instruments, Audio System, HVAC Controls, Power Accessories (windows, locks, mirrors), Diagnostic Trouble Codes (DTCs)

Body And Interior:

Body structure, Exterior panels, Doors, Glass, Seats, Trim, Climate control system

Maintenance:

Scheduled maintenance intervals, Fluid changes (oil, coolant, brake, transmission, differential), Filter replacements, Lubrication

Diagnostics:

Symptom-based troubleshooting, Diagnostic Trouble Code (DTC) diagnosis and clearing, Component testing, Electrical circuit analysis, Scan tool usage

Repair:

Engine component repair and overhaul, Transmission service and repair, Brake system repair, Suspension and steering component replacement, Electrical component repair, Body panel repair and replacement

Parts Information:

Parts identification, Exploded views, Part numbers, Component location

Depth:

Comprehensive, covering routine maintenance, troubleshooting, diagnosis, and complete component-level repairs. Includes detailed wiring diagrams and diagnostic flowcharts.

📊 Manual Specifications

Format:

PDF

Searchability:

Fully bookmarked and searchable text

Compatibility:

All Windows, Linux, and Mac operating systems

Printability:

Printable

Binding:

Digital (PDF format)

Media Type:

Digital

⚙️ Engine Specifications

Engine Type:

4.7L V8 (PowerTech)

Displacement:

4.7 Liters (285 cu in)

Horsepower:

Approximately 235-260 hp (depending on specific sub-model/tune)

Torque:

Approximately 300-325 lb-ft (depending on specific sub-model/tune)

Fuel System:

Multi-point Fuel Injection (MPI)

Valvetrain:

Overhead Valve (OHV), 16 valves

Block Material:

Cast Iron

Cylinder Head Material:

Aluminum

Engine Type:

4.0L Inline 6 (PowerTech)

Displacement:

4.0 Liters (242 cu in)

Horsepower:

Approximately 190 hp

Torque:

Approximately 235 lb-ft

Valvetrain:

Overhead Valve (OHV), 12 valves

Block Material:

Cast Iron

Cylinder Head Material:

Cast Iron

Engine Type:

2.7L CRD (Common Rail Diesel) - Mercedes-Benz OM664

Displacement:

2.7 Liters (165 cu in)

Horsepower:

Approximately 161 hp @ 4000 rpm

Torque:

Approximately 295 lb-ft @ 1800 rpm

Fuel System:

Common Rail Direct Injection (CRD)

Turbocharger:

Variable Geometry Turbocharger (VGT)

Block Material:

Aluminum

Cylinder Head Material:

Aluminum

🔧 Transmission

Type:

4-speed Automatic (45RFE/48RE)

Type:

5-speed Manual (NV3500) - less common on higher trims

Type:

5-speed Automatic (NAG1 - Mercedes-Benz 5G-Tronic)

Transfer Case:

Selec-Trac (2WD/4WD Full-Time), Quadra-Trac II (4WD with Low Range), Quadra-Drive II (4WD with Electronic Limited-Slip Differentials)

Automatic Gasoline Recommendation:

ATF+4 (Mopar)

Diesel Automatic Recommendation:

MB 236.10 or equivalent (e.g., ATF 134)

📐 Dimensions

Length:

Approx. 188.8 inches

Width:

Approx. 73.3 inches

Height:

Approx. 71.5 inches

Wheelbase:

Approx. 116.0 inches

Curb Weight:

Approx. 4,300 - 4,700 lbs (depending on engine and configuration)

Towing Capacity:

Up to 5,000 - 7,000 lbs (depending on engine and towing package)

🛡️ Safety Features

NHTSA Frontal Driver:

Good (2003 model year - specific ratings may vary slightly by year and test methodology)

NHTSA Frontal Passenger:

Good (2003 model year)

IIHS Frontal Offset:

Acceptable (for comparable years)

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

Available (e.g., Electronic Traction Control - ETC)

Stability Control:

Electronic Stability Program (ESP) - available on some models

Airbags:

Driver and front passenger airbags, available side curtain airbags

Seatbelts:

Front and rear seatbelts with pretensioners

💡 Technology Features

Audio System:

Factory AM/FM/CD player, optional Infinity Gold premium audio system with subwoofer

Navigation:

Optional factory navigation system

Cruise Control:

Standard cruise control

Parking Assist:

Rear parking assist (ParkSense) - optional

Auxiliary Inputs:

Typically none for auxiliary audio on factory systems (aftermarket solutions available)

🔧 Maintenance

Oil Change Interval Gasoline:

Every 3,000 - 6,000 miles or 6 months (depending on driving conditions and oil type, consult manual for specifics)

Oil Change Interval Diesel:

Every 5,000 - 7,500 miles or 6 months (depending on driving conditions and oil type, consult manual for specifics)

Coolant Flush Interval:

Typically every 30,000 - 60,000 miles or 2-5 years

Transmission Fluid Change Interval:

Every 30,000 - 60,000 miles (depending on transmission type and driving conditions)

Engine Oil Viscosity 4.7L:

SAE 5W-30 or 5W-40 (API Certified)

Engine Oil Viscosity 4.0L:

SAE 5W-30 or 10W-30 (API Certified)

Engine Oil Viscosity 2.7L Crd:

SAE 0W-40 or 5W-40 (API CJ-4 or ACEA C3 compliant)

Coolant Type:

HOAT (Hybrid Organic Acid Technology) - typically Mopar Antifreeze/Coolant 5 Year/100,000 Mile Formula (MS-9769)

Brake Fluid Type:

DOT 3

Common Problems 4.7L V8:

Crankshaft position sensor failure, intake manifold gasket leaks, cylinder head/valve seat issues (early models), oil sludge build-up if not maintained

Common Problems 4.0L I6:

Head gasket leaks (common on older high-mileage units), oil pan gasket leaks, occasional distributor issues

Common Problems 2.7L Crd:

Glow plug issues, turbocharger problems (if not maintained), EGR valve issues, potential for injector issues if fuel quality is poor

Common Problems Chassis Suspension:

Worn front lower ball joints, worn track bar bushings, premature wear of control arm bushings

Common Problems Electrical:

HVAC blower motor resistor failure, instrument cluster failure (dead pixels), Window regulator failures

📚 Vehicle History

Jeep Legacy:

Jeep has a long-standing reputation for ruggedness and off-road capability dating back to its military origins in WWII.

Grand Cherokee Introduction:

The Grand Cherokee was introduced in 1993 as a more luxurious and comfortable alternative to the Cherokee XJ, establishing the luxury SUV segment.

Wj Generation Introduction:

The WJ generation (1999-2004) was a significant redesign from the ZJ, featuring a more refined interior, improved on-road manners, and the introduction of the 4.7L V8 and the Mercedes-Benz sourced diesel engine.

Manufacturing Location:

Detroit, Michigan, USA (Jefferson North Assembly Plant)

Production Years Wj:

1999-2004

🏆 Awards & Recognition

Motor Trend SUV Of The Year Legacy:

The Grand Cherokee has historically been a strong contender and award winner in the SUV segment.

Vehicle Awards General:

The WJ generation was generally well-received for its blend of luxury, capability, and refinement, often praised for its powerful V8 and upscale interior for its time.