One problem related to air bag not deploy has been reported for the 2006 BMW 5 Series. The most recently reported issues are listed below.
The contact owns a 2006 BMW 525i. While driving approximately 10 mph, the contact's wife began to feel dizzy. The next thing she remembered is smoke appearing under the hood and she rear ended another vehicle. The air bags failed to deploy. The contact was injured and had to be transported to the hospital. The vehicle sustained damage to the front end. A police report was filed. There were no air bag recalls, but there is an open investigation regarding the air bags. The current and failure mileages were 14,500.