One problem related to front air bag has been reported for the 2007 Toyota Prius. The most recently reported issues are listed below.
My 2007 Toyota Prius was involved in side impact collision. The car was hit at the drivers side front wheel. Damage was from the drivers door around to the front of the car. The car that hit me was going around 40 miles per hour. My car was totaled, and I spent 3 nights in the hospital with a partially collapsed lung, broken rib, and a concussion. Neither the side or front airbags deployed. I have post concussion syndrome because of the accident. I believe that my concussion would have been much less had the airbag deployed. I am a public school teacher, and I have not been able to return to work for month, and the doctors say it could be at least a few more weeks. In addition I am told it could be 3 months or longer before my symptoms disappear.