NHTSA Owner Complaint Log
This page lists owner-reported complaints filed with NHTSA for the 2004 Hyundai Sonata. Complaints are unverified consumer reports submitted to NHTSA and do not by themselves prove a defect or defect rate.
WHILE PARKED FUEL FUMES ESCAPED FROM THE VEHICLE. *AK TANK AND SEALS WHERE REPLACED PROBLEM STILL OCCURED. *TC
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.