2003 Subaru Impreza - Maintenance & Specs
The 2003 Subaru Impreza belongs to a Subaru Impreza lineup that Know Your Ride tracks across 17 model years, from 1993 to 2026. Engine options on record include the 2.0L, 2.5L, 2.0L I4 / 2.5L I4. It is configured as 4-wheel or all-wheel drive with an automatic 4-spd. The 2003 sits mid-run, with both earlier (1993) and later (2026) Impreza model years also documented.
It takes 5W-30 conventional oil, 4.4 qt with a new filter meeting API SN. Fluid specs on file include Super Long Life coolant, DOT 3 brake fluid, Subaru ATF HP 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 33 ft-lb, lug nut 89 ft-lb, spark plug 18 ft-lb.
NHTSA complaints for this vehicle cluster around fuel system, gasoline (13), service brakes, hydraulic (13), fuel/propulsion system (12). A representative report reads: "My 2003 Subaru Impreza WRX has a very strong fuel odor that is coming into the cabin when I start my car up on cold days. It's been unusually cold here in..." There are 6 safety recalls on record; one covers: SUBARU IS RECALLING 36,791 MY 2002-2003 IMPREZA WAGONS. THE STUD BOLT(S) OF REAR GATE STAY MAY HAVE BEEN TIGHTENED WITH INSUFFICIENT TIGHTENING....
EPA fuel economy is rated at 17 city / 24 highway MPG, 20 MPG combined. Estimated annual fuel cost is about $2,900.
Quick Specs
| Oil viscosity | 5W-30 |
| Oil type | Conventional |
| Oil capacity (w/ filter) | 4.4 qt |
| OEM oil spec | API SN |
| Oil filter | Subaru 15208AA15A |
| EPA combined | 20 MPG |
| Tire size | 215/55R17 |
| Coolant | Super Long Life |
| Open recalls on record | 6 |
| Technical service bulletins | 27 |
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.