Driver-Side Air Bag Module
WARNING: This page is about a different car, the 2002 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
The driver-side air bag and inflator is stored in the steering wheel pad. It contains a squib, igniter charge and gas generant and inflates the air bag when instructed by air bag sensor assembly. Driver-side air bag module is also called steering wheel pad.