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Frontal airbags (driver and right front passenger)
are not intended to inflate during vehicle
rollovers, rear impacts, or in many side impacts.
The side impact airbags are intended to inflate
in moderate to severe side crashes. A side impact
airbag will inflate if the crash severity is above
the system’s designed “threshold level.” The
threshold level can vary with specific vehicle
design. Side impact airbags are not intended to
inflate in frontal or near-frontal impacts, rollovers,
or rear impacts. A side impact airbag is intended
to deploy on the side of the vehicle that is struck.
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. For frontal airbags, inflation
is determined by what the vehicle hits, the
angle of the impact, and how quickly the vehicle
slows down in frontal and near-frontal impacts.
For side impact airbags, inflation is determined by
the location and severity of the impact.
What Makes an Airbag Inflate?
In an impact of sufficient severity, the airbag
sensing system detects that the vehicle is
in a crash. The sensing system triggers a release
of gas from the inflator, which inflates the
airbag. The inflator, airbag, and related hardware
are all part of the airbag modules inside the
steering wheel, instrument panel, the side of the
front seatbacks closest to the door, and the ceiling
of the vehicle, near the side windows.
How Does an Airbag Restrain?
In moderate to severe frontal or near frontal
collisions, even belted occupants can contact the
steering wheel or the instrument panel. In
moderate to severe side collisions, even belted
occupants can contact the inside of the vehicle.
The airbag supplements the protection provided by
safety belts. Airbags distribute the force of the
impact more evenly over the occupant’s upper
body, stopping the occupant more gradually.
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