One problem related to gasoline fuel system has been reported for the 1999 Hyundai Elantra. The most recently reported issues are listed below.
The vehicle gets less than advertised gas mileage, consumer took the vehicle to the dealer 2 times for testing, and did not get a written record what was performed.
| Tank Assembly problems | |
| Fuel Injector problems | |
| Gasoline Fuel System problems |