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Cars and Transportation
Reply to "4 Runner Airbags did not deploy"
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[quote=Anonymous]The airbag accelerometer for most vehicles is under the seat. It also triggers the explosive seat belt pretensioners. It’s like a little ball bearing inside a tight metal tube. In a crash of sufficient force, the little metal ball is forced down the tube and completes the electrical circuit to fire the charges in the airbags and seat belts. The G threshold is VERY high. It sounds like it performed properly. 33 mph striking a car would not generate a sufficient G load to fire the sensor. 33 mph into a wall, tree, or other immoveable object would. But a car is lighter, and the kinetic energy is disapated more slowly due to the other car being pushed out of the way. The Delta V is far slower than a fixed object. [/quote]
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