One problem related to underhood wiring has been reported for the 2003 Nissan Frontier. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Nissan Frontier based on all problems reported for the 2003 Frontier.
While driving, the engine service light started flashing, indicating an engine fire. The fireman informed the consumer the fire was likely caused by an electrical short under the hood.
| Underhood Wiring problems | |
| Electrical System problems | |
| Ignition problems |