2003 Subaru WRX - Maintenance & Specs
The 2003 Subaru WRX belongs to a Subaru WRX lineup that Know Your Ride tracks across 10 model years, from 2003 to 2026. This 2003 car is the earliest model year on record for the Subaru WRX.
It takes 5W-30 full synthetic oil, 4.4 qt with a new filter meeting API SN. Fluid specs on file include Super Long Life coolant, DOT 4 brake fluid, Subaru ATF HP transmission fluid. Know Your Ride lists 13 scheduled maintenance items for this vehicle, the earliest interval falling at 7,500 miles. Documented torque values include oil drain plug 33 ft-lb, lug nut 89 ft-lb, spark plug 18 ft-lb.
There are 2 safety recalls on record; one covers: SUBARU IS RECALLING CERTAIN MODEL YEAR 2002 AND 2003 IMPREZA WRX VEHICLES ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE STATES OF SOUTH DAKOTA.... Its overall reliability signal is rated "Excellent" based on aggregated complaint and crash data.
Quick Specs
| Oil viscosity | 5W-30 |
| Oil type | Full Synthetic |
| Oil capacity (w/ filter) | 4.4 qt |
| OEM oil spec | API SN |
| Oil filter | K&N HP-1008 |
| Tire size | 245/60R18 |
| Coolant | Super Long Life |
| Open recalls on record | 2 |
| Technical service bulletins | 4 |
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.