Air Bag Not Deploy problems of the 2005 BMW 5 Series

On 12/5/2011 - when I started the car, I noticed the message on my dashboard indicating a fault on passenger restraint system. There was not any incident that I can recall that would result in the error message. After further research, I discovered that the error message was a common fault on these type of cars due to a faulty mat sensor located under the front passenger seat. I also found out that there was a recall for some BMW cars of the same model (dependent of VIN). My husband immediately called BMW of fremont (northern CA) to inquire about the recall and I was told by the service advisor that he was not aware of such recall. I use this car daily to drop off our kids to school. I honestly think the issue really poses a serious threat on my kids safety since there is a high possibility that the air bags will not deploy in case of an accident. Lastly, I also think that BMW na should fix this issue free of charge since it is becoming to be a common problem to BMW cars (especially the model series that I have). It would be greatly appreciated if you can assist me resolve the issue with BMW na.