Ford Mustang Owner's Manual page 127

quickly deflate. After the air bag deployment,
you may notice a smoke-like, powdery residue
or smell the burnt propellant. This is normal.
The residue may consist of cornstarch or talcum
powder (which is used to lubricate the air bag)
or sodium compounds, such as sodium
carbonates (e.g. baking soda) that result from the
combustion process that inflates the air bag.
Small amounts of sodium hydroxide may be
present which may irritate the skin and eyes, but
none of the residue is toxic. The Air Bag
Supplemental Restraint System will reduce, but
not eliminate all injuries in an accident.
Several air bag system components get hot
after inflation. Do not try to touch them
after inflation.
The air bag will inflate only once. The
system is designed to function on a
one-time-only basis. 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, this will increase the
risk of injury in a subsequent collision.
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WARNING
WARNING