Ford 1996 Windstar Manual page 25

Do not attempt to service, repair, or modify the Air Bag
Supplemental Restraint System or its fuses. See your
Ford or Lincoln-Mercury dealer.
If a collision occurs, the sensors sense the severity of the impact
and activates the air bags if necessary. The air bag system is
designed to deploy in frontal and front-angled collisions more
severe than hitting a parked vehicle (of similar size and weight)
head-on at about 28 mph (45 km/h). Because the system senses
the crash severity rather than vehicle speed, some frontal
collisions at speeds above 28 mph (45 km/h) will not inflate the
air bag.
When the sensors activate the system, the air bags inflate
rapidly, filling with non-toxic nitrogen gas in a fraction of a
second. Immediately after inflation, the air bags deflate by
releasing the nitrogen gas through vent holes. The whole
process takes place in a matter of seconds.
Air bag system components get hot after inflation. Do
not touch them after inflation.
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