One problem related to air bag on-off switch has been reported for the 2014 Toyota Prius. The most recently reported issues are listed below.
My daughter was traveling down 121 by grapevine mills mall. She noticed a driver being aggressive. So she attempted to switch to get away from him. When she was checking to merge to next lane the aggressive driver stopped for no reason. Intentionelly wrecking her car. Then driving off. Her vehicle had extensive damage and her air backs never deployed. Her Prius c had driver side front end damage. The front driver side fender was ripped from the vehicle.