Saturn 2009 ASTRA - Manual (Page 32)

The vehicle has seat-mounted
side impact and roof-rail airbags.
See Airbag System on page 1-24.
Seat-mounted side impact and
roof-rail airbags are intended
to inflate in moderate to severe
side crashes. Seat-mounted
side impact and roof-rail airbags will
inflate if the crash severity is above
the system’s designed threshold
level. The threshold level can vary
with specific vehicle design.
Seat-mounted side impact and
roof-rail airbags are not intended to
inflate in frontal impacts, near-frontal
impacts, rollovers, or rear impacts.
A seat-mounted side impact airbag is
intended to deploy on the side of the
vehicle that is struck. A roof-rail
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.
For seat-mounted side impact and
roof-rail airbags, deployment is
determined by the location
and severity of the side impact.
What Makes an Airbag
Inflate?
In a deployment event, the sensing
system sends an electrical signal
triggering a release of gas from the
inflator. Gas from the inflator fills
the airbag causing the bag to
break out of the cover and deploy.
The inflator, the airbag, and
related hardware are all part of the
airbag module.
Frontal airbag modules are located
inside the steering wheel and
instrument panel. For vehicles with
seat-mounted side impact airbags,
there are airbag modules in the side
of the front seatbacks closest to
the door. For vehicles with roof-rail
airbags, there are airbag modules
in the ceiling of the vehicle, near the
side windows that have occupant
seating positions.
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.
Airbags supplement the protection
provided by safety belts. Frontal
airbags distribute the force of the
impact more evenly over the
occupant’s upper body, stopping
the occupant more gradually.
Seat-mounted side impact and
roof-rail airbags distribute the force
of the impact more evenly over the
occupant’s upper body.
1-28 Seats and Restraints