Segment:
Mid-size Luxury SUV
Competitors 2003:
Ford Explorer, Chevrolet TrailBlazer, Toyota 4Runner, Nissan Pathfinder, Land Rover Discovery
Platform:
WJ platform, known for its refined ride and improved interior compared to its predecessor.
Powertrain:
Engine (4.0L, 4.7L), Transmission (42RE, 45RFE/545RFE), Transfer Case (NV242, NV247)
Chassis:
Suspension (Front/Rear), Steering, Brakes (ABS, Conventional), Driveline
Electrical:
Wiring Diagrams, Lighting, Instruments, Power Accessories, HVAC Controls, Audio System
Body:
Body Panels, Doors, Windows, Seats, Interior Trim, Exterior Trim
Maintenance:
Scheduled Maintenance, Oil Changes, Filter Replacements, Lubrication
Troubleshooting:
Diagnostic Procedures, Fault Codes, Symptom-Based Diagnostics
Repair:
Engine Overhaul, Transmission Rebuild, Brake System Repair, Suspension Component Replacement
Installation:
Component Replacement, Accessory Installation
Depth:
Comprehensive diagnostic, repair, and overhaul procedures for all major vehicle systems.
Engine 1:
4.0L Inline-6 'PowerTech' I6
Engine 2:
4.7L V8 'PowerTech' V8
Engine 1 Hp:
195 hp @ 4400 rpm
Engine 1 Torque:
230 lb-ft @ 3200 rpm
Engine 2 Hp:
235 hp @ 4500 rpm (Standard), 260 hp @ 5000 rpm (HO)
Engine 2 Torque:
295 lb-ft @ 3200 rpm (Standard), 325 lb-ft @ 3500 rpm (HO)
Fuel Delivery:
Multi-port Fuel Injection (MPI)
Transmission 1:
42RE 4-Speed Automatic (with 4.0L engine)
Transmission 2:
45RFE/545RFE 4-Speed Automatic (with 4.7L engine)
Transfer Case 1:
Selec-Trac NV242 (Full-time 2WD/4WD Part-time)
Transfer Case 2:
Quadra-Trac II NV247 (Full-time 4WD with 2-speed transfer case, electronically controlled)
NHTSA Frontal Driver Side:
★★★★☆ (4-star)
NHTSA Frontal Passenger Side:
★★★★☆ (4-star)
IIHS Frontal Offset:
Good
Traction Control:
Available (ASR)
Electronic Stability Control:
Available (Electronic Stability Program - ESP)
Airbags Front:
Standard Dual Frontal Airbags
Airbags Side:
Optional Front Side Curtain Airbags
Seat Belts:
3-point front and rear seat belts
Audio System:
Available premium audio systems, including Infinity Gold series. CD player, optional CD changer.
Navigation:
Optional factory navigation system (Recalibration may be required after certain repairs).
Parking Assist:
Optional rear parking assist sensors.
Phone Integration:
Optional Uconnect hands-free communication system (for later model years, but the basis for integration is covered).
Oil Change Interval:
Every 7,500 miles or 6 months, whichever comes first (under normal driving conditions).
Transmission Fluid Change:
Every 30,000-60,000 miles, depending on driving conditions and transmission type.
Coolant Flush:
Every 30,000-60,000 miles or 2-4 years.
Engine Oil 4.0L:
API SJ or higher, SAE 5W-30 (or 10W-30 depending on climate)
Engine Oil 4.7L:
API SL or higher, SAE 5W-30
Transmission Fluid 42Re:
ATF+4 (MS-9602)
Transmission Fluid 45Rfe/545Rfe:
ATF+4 (MS-9602)
Coolant:
Chrysler/Mopar HOAT (Hybrid Organic Additive Technology) Antifreeze/Coolant, a 50/50 mix with distilled water.
Engine Performance:
Spark plug blow-out (4.0L), head gasket leaks (4.7L), occasional overheating.
Transmission:
Slipping, hard shifts, occasional failure of solenoid packs or valve body components.
Suspension Steering:
Worn control arm bushings, ball joints, and tie rod ends. Death wobble can occur with worn steering components.
Electrical:
Window regulator failures, HVAC blower motor resistor failure, instrument cluster issues.
Jeep Legacy:
Jeep has a long-standing reputation for off-road capability and durable SUVs since WWII.
Wj Generation Start:
1999
Wj Refresh:
The 2003 model year represents a mid-cycle refresh for the WJ generation, introducing revised styling, improved interior, and updated features.
Manufacturing Location:
Jefferson North Assembly Plant, Detroit, Michigan, USA
Automotive Press:
Often praised by automotive journalists for its refinement, comfortable ride, and capable powertrains for its class.
Reliability Consumer Reports:
Mixed to Average (based on historical data, specific model year reliability can vary).
