Ignition, Charging System, Starting System, Lighting, Instrumentation, Body Control Module (BCM), Powertrain Control Module (PCM), HVAC Controls, Power Accessories
Body:
Interior & Exterior Trim, Doors, Glass, Seats, Bumpers, Body Panels
Selec-Trac NV242 (Full-time 4WD), Quadra-Trac II NV247 (On-Demand 4WD)
Fluid Specifications
Transmission Fluid Type:
ATF+4 (MS-9602)
📐 Dimensions
Exterior
Wheelbase:
116.0 inches (2946 mm)
Length:
186.1 inches (4727 mm)
Width:
72.4 inches (1839 mm)
Height:
66.9 inches (1699 mm)
Weights
Curb Weight Approx:
4500 - 4800 lbs (2041 - 2177 kg)
Max Towing Capacity:
Up to 6,500 lbs (2948 kg)
🛡️ Safety Features
Ratings
NHTSA Rollover Resistance:
3 out of 5 stars (for 2001 models)
Active Features
ABS:
Standard Anti-lock Braking System (4-wheel disc brakes)
Traction Control:
Optional (often bundled with 4WD systems)
Passive Features
Airbags:
Standard front airbags, optional side curtain airbags
Seat Belts:
3-point height-adjustable front, 3-point rear
💡 Technology Features
Infotainment
Audio Options:
Base AM/FM stereo, optional CD player, optional Infinity Gold premium audio system (8 speakers, amplifier, subwoofer).
Navigation System:
Optional factory navigation system available on select trims.
Driver Assistance
Cruise Control:
Standard
Parking Sensors:
Optional rear parking assist system
Connectivity
Telematics:
Optional Uconnect (though early iterations, not the modern Uconnect system).
Convenience Features
Memory Seats:
Available on higher trims
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 3,000-7,500 miles (5,000-12,000 km) or 6 months, depending on oil type and driving conditions (refer to manual for specifics).
Transmission Fluid Change Interval:
Every 30,000-60,000 miles (48,000-96,000 km) or 2-3 years, depending on usage.
Engine Coolant Change Interval:
Every 30,000 miles (48,000 km) or 2 years for conventional coolant; longer for HOAT or OAT coolants.
Fluid Specifications
Engine Oil Specification 4.0L:
SAE 10W-30 (API SG/SH or higher)
Engine Oil Specification 4.7L:
SAE 5W-30 (API SG/SH or higher)
Coolant Type:
Chrysler HOAT (Hybrid Organic Additive Technology) or equivalent
Brake Fluid Type:
DOT 3
Known Issues
Headliner Sagging:
Common issue due to adhesive failure in hot climates.
Cracked Exhaust Manifolds:
Especially prevalent on the 4.7L V8 due to heat cycling.
Heater Matrix Leaks:
Can lead to coolant loss and fogged windows.
Power Window Motors Failure:
Common wear item on all vehicles.
Lower Ball Joint Wear:
Can cause steering looseness and tire wear.
📚 Vehicle History
Brand Heritage
Jeep Legacy:
Founded on military utility vehicles, Jeep has a long history of 4x4 capability and adventure.
Model Evolution
Wj Generation Intro:
Introduced for the 1999 model year, the WJ represented a significant modernization over its ZJ predecessor, featuring a unibody construction and more refined interior.
Wj Generation Updates:
The 2001 model year saw minor refinements, particularly in powertrain and options, building on the platform introduced in 1999. The 4.7L V8 received updates for better performance and emissions.
Production
Manufacturing Plant:
Jefferson North Assembly Plant, Detroit, Michigan, USA
Production Years
Wj Production Span:
1999-2004
🏆 Awards & Recognition
Recognitions
Four Wheel Drive System Accolades:
Jeep's 4x4 systems consistently recognized for off-road capability.
Ratings
Consumer Reports Reliability 2001:
Variable; earlier WJ models had some reported reliability concerns, improved in later years.
Certifications
California Emissions Standards:
Vehicles sold in California were often certified to stricter PZEV (Partial Zero Emission Vehicle) standards.