Ford MUSTANG Manual page 29

Inflated right front passenger side air bag
If the air bag is inflated, THE AIR BAG
WILL NOT FUNCTION AGAIN AND
MUST BE REPLACED IMMEDIATELY. If
the air bag is not replaced, the unrepaired
area will increase the risk of injury in a
collision.
The air bag system uses a readiness light on the
instrument cluster or a tone to indicate the
condition of the system. When you turn the
ignition to the ON position, this light will
illuminate for approximately six (6) seconds and
then turn off. This indicates that the system is
operating normally. NOTE: Maintenance of the
air bag system is not required.
RWARNING
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