One problem related to alternator/generator/regulator has been reported for the 2003 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Hyundai Sonata based on all problems reported for the 2003 Sonata.
After driving my car and shutting engine off for as little as five minutes the car would not start again. This has happen several times and it has been in the shop for repair eleven times. On one occasion my car lost power, engine died and would not start again. Car would have to be towed to the dealership. I have been through three alternators and one battery. They is a major electrical problem with the car. Hyundai will not replace this lemon. Car is in the shop now.
| Electrical System problems | |
| Battery problems | |
| Wiring problems | |
| Car Will Not Start problems | |
| Battery Dead problems | |
| Underhood Wiring problems | |
| Dashboard Failed problems | |
| Alternator/generator/regulator problems |