Hyundai Elantra HD: Why didn’t my air bag go off in a collision? (Inflation and non-inflation conditions 
of the air bag) - Airbag-advanced supplemental restraint system - Safety system of your vehicle - Hyundai Elantra HD 2006–2010 Owners ManualHyundai Elantra HD: Why didn’t my air bag go off in a collision? (Inflation and non-inflation conditions of the air bag)

There are many types of accidents in which the air bag would not be expected to provide additional protection.

These include rear impacts, second or third collisions in multiple impact accidents, as well as low speed impacts. In other words, just because your vehicle is damaged and even if it is totally unusable, don’t be surprised that the air bags did not inflate.

Curtain air bag (if equipped)
Curtain air bags are located along both sides of the roof rails above the front and rear doors. They are designed to help protect the heads of the front seat occupants and the rear outboard s ...

Air bag collision sensors
(1) SRS control module (2) Front impact sensor (3) Side impact sensor (if equipped) WARNING Do not hit or allow any objects to impact the locations where air bags or sensors are insta ...