Front Air Bag Sensor Control problems of the 2004 Nissan Altima

I was in an accident on 20oct 2014 and my insurance considered car as " total loss" after appraisal but air bag did not open even though it was severe damage as I rear ended car in front x I did suffer muscle ache for couple of days but no medical attention was needed x even my prescription glasses for distance broke with impact prior to this event past 4 years I was taking my car to Nissan dealership for " sensor" issues even though there was no mechanical problem with car and I had to bear the expenses every time sensor light came on this happened almost every year for 3 consecutive years and I complained to Nissan but they did nothing about it & now with air bag not opening with total damage to front end of my car was very worrisome I do have pictures / police report for accident & Nissan repair work done in past for sensor issues if needed thank you for investigating.