One problem related to defogger has been reported for the 2004 Hyundai XG350. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Hyundai XG350 based on all problems reported for the 2004 XG350.
The rear defogger grid keeps breaking. When you turn on the defogger it cases interference in the radio since the grid and antenna are both embedded in the read windshield.