2004 Hyundai Sonata - Maintenance & Specs
The 2004 Hyundai Sonata belongs to a Hyundai Sonata lineup that Know Your Ride tracks across 25 model years, from 1989 to 2026. Engine options on record include the 2.4L, 2.7L, 2.4L I4 / 2.7L V6. It is configured as front-wheel drive with an automatic 4-spd. The 2004 sits mid-run, with both earlier (1989) and later (2026) Sonata model years also documented.
It takes 5W-20 conventional oil, 4.5 qt with a new filter meeting API SN. Fluid specs on file include Long Life coolant, DOT 3 brake fluid, SP-IV 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 26 ft-lb, lug nut 80 ft-lb, spark plug 18 ft-lb.
NHTSA complaints for this vehicle cluster around air bags (35), suspension (32), structure (23). A representative report reads: "2004 Hyundai Sonata GLS front sub frame (K Frame) has rusted out but I guess for certain VIN numbers there was a recall. Mine has the same issue and has caused..." There is 1 safety recall on record; one covers: HYUNDAI IS RECALLING 188,282 MY 2001-2004 SONATA AND MY 2001-2004 XG300 AND XG350 VEHICLES ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE STATES....
EPA fuel economy is rated at 19 city / 28 highway MPG, 22 MPG combined. Estimated annual fuel cost is about $2,000.
Quick Specs
| Oil viscosity | 5W-20 |
| Oil type | Conventional |
| Oil capacity (w/ filter) | 4.5 qt |
| OEM oil spec | API SN |
| Oil filter | Wix 51394 |
| EPA combined | 22 MPG |
| Tire size | 215/55R17 |
| Coolant | Long Life |
| Open recalls on record | 1 |
| Technical service bulletins | 21 |
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.