Adding an airbag to a car?

No no no, seatbelt pretensioners work in conjunction with the airbag(s) as part of the SRS system. When a crash is detected, a pyrotechnic charge is fired in the seatbelt reel which rapidly pulls the seatbelt back to stop you from being thrown forward at all.
 
Just a guess about the pretensioners :p

When I fitted my '6 interior the chap who had the seats before had messed up the wiring connectors to them, so I had to take the side panel off and have a fiddle (as you do)

Metal tube with capped ends, big piece of steel strand wire going from it to the seatbelt holder (the bit you clip into) I figured that if you crashed hard enough it would feel the full brunt of your seatbelt tugging and fire your airbags off

Clarkeys breakdown of the SRS system probably has more truth to it.. although it sounds rather violent :eek:
 
From Wikipedia

Airbags are designed to deploy in frontal and near-frontal collisions that are more violent than a 23 km/h (14 mph) barrier collision, or similarly, striking a parked car of similar size across the full front of each vehicle at about twice the speed. (The parked car absorbs some of the energy of the crash.)

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The airbag sensor is a MEMS accelerometer, which is a small integrated circuit with integrated micro mechanical elements. The microscopic mechanical element moves in response to rapid deceleration, and this motion causes a change in capacitance, which is detected by the electronics on the chip that then sends a signal to fire the airbag. The most common MEMS accelerometer in use is the ADXL-50 by Analog Devices, but there are other MEMS manufacturers as well.
Click to expand...

If the accelerometer is contained in the airbag unit and doesn't require any external inputs then it may well work. Although if an airbag was that important to me then I'd probabaly sell the car and buy a similar aged one which had them fitted in the factory.
 
Thanks for all the replys, he bought it for my brother to learn to drive in and he doesnt want him learing in something without airbags.
 
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