2009 Hyundai Elantra Owner's Manual - Page 64

Safety features of your vehicle 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. OHD036026/OHD036028/OHD036029/OHD036030 Air bag collision sensors (1) SRS control module (2) Front impact sensor (3) Side impact sensor (if equipped) 3 46