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Randall C
Randall C, ASE Certified Technician
Category: Car
Satisfied Customers: 12833
Experience:  32 years Foreign / Domestic Cars All aspects of Diag and Repair
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An air bag react as planned when a stationary car with the engine

Resolved Question:

Will an air bag react as planned when a stationary car with the engine off is hit by a moving vehicle?
Submitted: 7 years ago.
Category: Car
Expert:  Randall C replied 7 years ago.
Hello, airbags do not work in this way. the system is too complicated to completely send the info but airbags are controlled by special sensors and a module and the module is what decides to set the bag off. being hit from the rear will not set the bag off as a front airbag is not needed for rear impact. sensors and module read de accleration factors and make split decsion on the airbag deploy. By getting hit stationary, you are basically acclerating and no, the bag is not designed to go off under that condition. You , as the driver must be moving, hit an object, de accelerate to match the module program in order to set bag off. there have been very rare occations that a vehicle is hit, not moving and the point of impact was so precise etc that has set off the airbag. very rare. A vehicles manufactures have different sensors, module etc but to date,I no of none that are designed to protect on standing car, shut off etc. Some models do have headrest airbags for rear impacts to prevent whiplash but still the car must be key on, /running
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