2003 Toyota 4Runner - Maintenance & Specs
The 2003 Toyota 4Runner belongs to a Toyota 4Runner lineup that Know Your Ride tracks across 27 model years, from 1984 to 2026. Engine options on record include the 4.0L, 4.7L, 4.0L V6 / 4.7L V8. It is configured as rear-wheel drive with an automatic 4-spd. The 2003 sits mid-run, with both earlier (1984) and later (2026) 4Runner model years also documented.
It takes 5W-30 conventional oil, 5.5 qt with a new filter meeting ILSAC GF-4. Fluid specs on file include Super Long Life coolant, DOT 3 brake fluid, ATF WS 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 30 ft-lb, lug nut 76 ft-lb, spark plug 18 ft-lb.
NHTSA complaints for this vehicle cluster around structure (206), engine and engine cooling (84), unknown or other (51). A representative report reads: "Many things are happening to my truck that's why I am contacting you people to see if I got any callback thank you so much" There are 3 safety recalls on record; one covers: ...NVILLE, FLORIDA PORT AND DISTRIBUTED BY SOUTHEAST TOYOTA DISTRIBUTORS IN THE STATES OF ALABAMA, FLORIDA, GEORGIA, NORTH AND SOUTH CAROLINA, WHEN THE....
EPA fuel economy is rated at 16 city / 20 highway MPG, 18 MPG combined. Estimated annual fuel cost is about $2,450.
Quick Specs
| Oil viscosity | 5W-30 |
| Oil type | Conventional |
| Oil capacity (w/ filter) | 5.5 qt |
| OEM oil spec | ILSAC GF-4 |
| Oil filter | Toyota 90915-YZZD1 |
| EPA combined | 18 MPG |
| Tire size | 245/60R18 |
| Coolant | Super Long Life |
| Open recalls on record | 3 |
| Technical service bulletins | 8 |
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
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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.