One problem related to fuel hoses lines/piping and fittings has been reported for the 2004 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Hyundai Sonata based on all problems reported for the 2004 Sonata.
While parked fuel fumes escaped from the vehicle. Tank and seals where replaced problem still occured.
| Tank Assembly problems | |
| Fuel Hoses Lines/piping And Fittings problems | |
| Fuel Pump problems |