Disabling System
WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Unintentional air bag module deployment is possible. Personal injury may result. Never use radio key code (memory) savers when working on air bag system.
Turn ignition switch to LOCK position. Disconnect negative battery cable and wait for at least one minute.