One problem related to underhood wiring 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.
: the contact stated the vehicle failed to start. While inspecting under the hood of the vehicle it was discovered that the wires were melted. The vehicle was towed to a dealership. Upon inspection the dealer determined the wires were damaged by rodents. The wiring harness is being replaced.