Ford 1997 Aerostar Manual page 128

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.
The Air Bag Supplemental Restraint System
consists of:
driver and passenger air bag modules (which
include the inflators and air bags),
one or more impact and safing sensors,
a system diagnostic module,
a readiness light and tone,
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