Volvo S40 Owner's Manual page 17

2007 Volvo S40
The front airbags supplement the three-point seat belts. For these airbags to provide the protection
intended, seat belts must be worn at all times.
The front airbag system includes gas generators and the airbags. A deceleration sensor activates the gas
generators, causing the airbags to be inflated with nitrogen gas.
As the movement of the seats' occupants compresses the airbags, some of the gas is expelled at a
controlled rate to provide better cushioning. Both seat belt tensioners also deploy, minimizing seat belt
slack. The entire process, including inflation and deflation of the airbags, takes approximately one fifth of
a second.
The location of the front airbags is indicated by "SRS AIRBAG" embossed on the steering wheel pad and
above the glove compartment, and by decals on both sun visors and on the front and far right side of the
dash.
The driver's side front airbag is folded and located in the steering wheel hub.
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