One problem related to air bag 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.
Purchased nice Xg350l test drove ,purchased, upon delivery srs light on dealer tom ahl Hyundai mentioned a TSB tech svc bulletin for the "fix" found out 2 yrs later there fix was a zip tie to re-bind the connector under the drivers seat , upon the light coming back on and service dept told me $2000 for fix since connectors are now loose. . . Why is their no investigation. Poor connector has failed and many of these are having the same poor engineering/poor design of connector that is now making good contact due to "seat being moved".