2003 Jeep Wrangler - Maintenance & Specs
The 2003 Jeep Wrangler belongs to a Jeep Wrangler lineup that Know Your Ride tracks across 32 model years, from 1986 to 2026. Engine options on record include the 2.4L, 4.0L, 2.4L I4 / 4.0L V6. It is configured as 4-wheel or all-wheel drive with an automatic 4-spd. The 2003 sits mid-run, with both earlier (1986) and later (2026) Wrangler model years also documented.
It takes 5W-30 conventional oil, 6.0 qt with a new filter meeting MS-6395. Fluid specs on file include HOAT coolant, DOT 3 brake fluid, ATF+4 transmission fluid. Know Your Ride lists 14 scheduled maintenance items for this vehicle, the earliest interval falling at 7,500 miles. Documented torque values include oil drain plug 20 ft-lb, lug nut 100 ft-lb, spark plug 18 ft-lb.
NHTSA complaints for this vehicle cluster around power train (16), suspension (11), fuel system, gasoline (7). A representative report reads: "The factory weld on the front end driver's side stabilizer was bad and it came apart on the highway while driving , from the severe shaking it caused, and it..." There are 4 safety recalls on record; one covers: ...STOP HARDTOP MADE FOR THE 1986-1995 AND 1997-2003 JEEP WRANGLER. THE COCKPIT COVER MAY NOT STAY LATCHED TO THE ROOF RACK BECAUSE THE LATCH BRACKET....
EPA fuel economy is rated at 16 city / 18 highway MPG, 17 MPG combined. Estimated annual fuel cost is about $2,600.
Quick Specs
| Oil viscosity | 5W-30 |
| Oil type | Conventional |
| Oil capacity (w/ filter) | 6.0 qt |
| OEM oil spec | MS-6395 |
| Oil filter | Fram PH16 |
| EPA combined | 17 MPG |
| Tire size | 245/60R18 |
| Coolant | HOAT |
| Open recalls on record | 4 |
| Technical service bulletins | 32 |
Common Trouble Codes
- P0300 - Random/Multiple Cylinder Misfire Detected
- P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
- P0171 - System too Lean (Bank 1)
- P0128 - Insufficient Coolant Temperature for Stable Operation
- P0442 - Evaporative Emission Control System Leak Detected (small leak)
- P0455 - Evaporative Emission Control System Leak Detected (gross leak)
- P0700 - Transmission Control System Malfunction
- P0301 - Cylinder 1 Misfire Detected
- U0100 - Lost Communication With ECM/PCM A
Related Vehicles
Part of the free Know Your Ride vehicle maintenance reference. Figures are sourced from EPA, NHTSA and manufacturer data and are for general reference - always confirm with your owner's manual.