On a car--what is a dual stage airbag and why is it different or better than a normal one...?
by 
BillyGEE
ANSWERS: 3
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Many new vehicles offer computer-operated dual deploy or dual-stage airbags. These "smart" airbags can deploy at two speeds, or not at all, depending on information sent to the computer from sensors located in the seatbelts and front seats. In less severe accidents, airbags deploy at the lower first stage, usually about 70 percent of full force. In more severe accidents, both stages are deployed. Seat sensors in some systems also can detect the weight of passengers and deploy only if the occupant is above a certain weight - helping to prevent airbag-related injuries to a child or small adult. In some vehicle systems, if no one is sitting in the passenger seat, the airbag won't deploy. Systems offered in some luxury models help protect smaller drivers by only deploying the driver's front airbag at the lower stage. Smaller drivers are detected by the forward position of the seat on the seat track.
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more money...?
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WHAT IS THE SAFETY DIFFENENCE...
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