All new vehicles in the United States include front air bags for the driver and passengers, but many automakers go beyond that minimum requirement.
Air bags are designed so that they don't have to be turned on, but it is sometimes possible to turn them off. When a vehicle includes the option to disable the passenger-side air bags, the deactivation mechanism is usually located on the passenger side of the dash.
The disarming procedure for driver's side air bags is typically more complicated, and following an incorrect procedure can cause the air bag to deploy. If you are concerned that your driver's side air bag may injure you, your best course of action is to have a trained professional disable the mechanism.