Air Conditioner problems of the 2006 Nissan Quest

I purchase a used Nissan Quest in June 2016 couple weeks later the air bag light starts flashing. Another thing is the cluster that reads over hearing and miles flashes and twitches. My vehicle at the time of purchase had 121,246 miles I'm the second owner. I took to courtesy Nissan and was told that the flashing airbag light is nothing to worry about, but I have seen several reviews and complaints about the airbags and can't stop worrying since this is a family vehicle. Another issue with the vehicle is the sensors and timing chain gave up soon. Also at to replace air conditioning system. This has been a hole in my pocket since I purchased. States there is a recall but I'm not sure.