When Should an Airbag Inflate?
Airbags are designed to inflate in moderate to
severe frontal or near-frontal crashes. But they are
designed to inflate only if the impact exceeds a
predetermined deployment threshold. Deployment
thresholds take into account a variety of desired
deployment and non-deployment events and
are used to predict how severe a crash is likely to
be in time for the airbags to inflate and help
restrain the occupants. Whether your frontal
airbags will or should deploy is not based on how
fast your vehicle is traveling. It depends largely
on what you hit, the direction of the impact,
and how quickly your vehicle slows down. The
threshold level can vary, however, with specific
vehicle design, so that it can be somewhat above
or below this range.
Frontal airbags may inflate at different crash
speeds. For example:
• If the vehicle hits a stationary object, the
airbags could inflate at a different crash speed
than if the vehicle hits a moving object.
• If the vehicle hits an object that deforms, the
airbags could inflate at a different crash
speed than if the vehicle hits an object that
does not deform.
• If the vehicle hits a narrow object (like a pole),
the airbags could inflate at a different crash
speed than if the vehicle hits a wide object
(like a wall).
• If the vehicle goes into an object at an angle,
the airbags could inflate at a different crash
speed than if the vehicle goes straight into the
object.
Frontal airbags are not intended to inflate during
vehicle rollovers, rear impacts, or in many
side impacts.
In any particular crash, no one can say whether
an airbag should have inflated simply because
of the damage to a vehicle or because of what
the repair costs were. Inflation is determined
by what the vehicle hits, the angle of the impact,
and how quickly the vehicle slows down.
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