The Santa Fe recall involves nearly 200,000 vehicles in the 2007 to 2009 model years. Hyundai dealers will reprogram the front passenger air bag sensors so they will accurately detect when a small adult is seated.
Hyundai said it has received complaints from some adults under 130 pounds whose air bags didn't deploy. The air bags were originally programmed not to go off to protect children.
The company is also recalling 22,500 Sonata sedans from the 2012 and 2013 model years because their side air bags could go off without warning.
Hyundai says it has received 16 complaints about the Sonata's air bags, but no injuries have been reported.
Owners may contact Hyundai at 1-800-633-5151.