One problem related to air bag light on has been reported for the 2015 Subaru Forester. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Subaru Forester based on all problems reported for the 2015 Forester.
Passenger side airbag shuts off and a red indicator light appears on the dashboard while driving with someone in the seat. If you stop and turn the car off the system will reset. It has happened over 10xs. It's been checked out at the dealer several times. They said airbag related equipment is only covered for 3 years. I was 2 months out of warranty when I first complained. I thought the airbags and seatbelt systems were covered for 5 years.