Lexus RX 450h 2010 Owner's Manual page 126

The main SRS airbag system components are shown above. The SRS air-
bag system is controlled by the airbag sensor assembly. The airbag sen-
sor assembly consists of a safing sensor and an airbag sensor.
In certain types of severe frontal or side impacts, the SRS airbag system
triggers the airbag inflators. A chemical reaction in the inflators quickly
fills the airbags with non-toxic gas to help restrain the motion of the occu-
pants.
If the SRS airbags deploy (inflate)
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Bruising and slight abrasions may result from contact with a deploying (inflating)
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SRS airbag.
A loud noise and white powder will be emitted.
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Parts of the airbag module (steering wheel hub, airbag cover and inflator) as
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well as the seats, parts of the front and rear pillars, and roof side rails, may be hot
for several minutes. The airbag itself may also be hot.
The windshield may crack.
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SRS airbag deployment conditions (SRS front airbags)
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The front SRS airbags will deploy in the event of an impact that exceeds the
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set threshold level (the level of force corresponding to an approximately 12 -
18 mph [20 - 30 km/h] frontal collision with a fixed wall that does not move or
deform).
However, this threshold velocity will be considerably higher if the vehicle strikes
an object, such as a parked vehicle or sign pole, which can move or deform on
impact, or if the vehicle is involved in an underride collision (e.g. a collision in
which the front of the vehicle "underrides", or goes under, the bed of a truck etc.).
It is possible that in some collisions where the forward deceleration of the vehi-
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cle is very close to the designed threshold level, the SRS front airbags and the
seat belt pretensioners may not activate together.
The SRS front passenger airbag will not activate if there is no passenger sitting
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in the front passenger seat. However, the SRS front passenger airbag may
deploy if luggage is put in the seat, or the seat belt is fastened, even if the seat is
unoccupied. (→P. 89)
1-8. Safety information
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