One problem related to side/window air bag has been reported for the 2001 Hyundai XG350. The most recently reported issues are listed below.
My 2001 Hyundai Xg350l was involved in a side accident and the side airbag did not deploy. This car had been to the dealer months ago subject to a recall to fix something defective on the side air bag. I have found no way to send this information to Hyundai on their website.