PERODUA VIVA L250 2007 Owner's Manual page 238

The reasons are:
The air bags are only supplemental
restraint devices. Therefore, the air
bags alone will not support you se­
curely in the event of severe frontal
collision. Moreover, the air bags in­
flate rapidly, and they deflate immedi­
ately. Hence, they can not protect you
from impacts once the air bags have
deflated.
The effectiveness of SRS air bags will
reduce or serious bodily injuries may
be caused if you do not wear each seat
belt securely or are not seated cor­
rectly. This is because not only the
SRS air bags may fail to reduce im­
pacts applied to you, but also because
they may hurt you by its operation due
to improper distance between the
steering wheel, instrument panel and
your body.
When the warning light is illuminated
or flashes, there will be cases where
the SRS air bags do not operate, even
if the vehicle is subjected to severe
frontal collisions.
The SRS air bags operate only in se­
vere frontal collisions. Therefore, there
are the possibilities that the SRS air
bags may not operate when low-level
impacts are applied to the sensor in
the control unit, for example, in the
following cases given below.
Frontal collision to a concrete wall
with a speed of less than 25 km/h;
When your vehicle dives into below
the rear cargo bed of a large-sized
truck;
When your vehicle receives impacts
from the side or rear of the vehicle;
When your vehicle collides with an
electricity pole, etc.