One problem related to side/window air bag has been reported for the 2006 Kia Motor Optima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Kia Motor Optima based on all problems reported for the 2006 Optima.
Your NHTSA campaign id no. 08v161000, concerning the airbag system on 2006-08 Hyundai sonatas, should be expanded to include kia Optimas. I just had the exact same problem with a 2006 kia Optima, , which I purchased from enterprise car sales and then returned within the 7-day return period due to discovery of this problem. The software did not recognize a 120-pound adult as an adult on the passenger side, as a result of which we got the signal that the passenger side air bag was off.