One problem related to front air bag has been reported for the 2009 Nissan Maxima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Nissan Maxima based on all problems reported for the 2009 Maxima.
We own a 2009 Nissan Maxima that was purchased new on September 25, 2009. When driving the vehicle with my wife in the passenger seat the air bag system turns of the airbag. My wife is 5'5" and 125lbs, well within normal adult size. Upon discovering the problem we have taken the vehicle into the dealerships mechanic 4 times over the last 11 months with every time other than the initial visit lasting almost a week each time. The last time we took it in I called the dealership manager and was told that they had no record of our vehicle being in there shop ever. Upon the completion of the final trip to the shop we discussed the issues at length with the service manager of the dealership and we replicated the issue in both the 2010 and 2011 model Maxima's. We have since called Nissan looking to have our car purchased back or have the problem repaired so that the airbag will work with her in the car. At that time we were told that Nissan's airbag system was designed to take into account all factors and make a decision at that time. As of August 20th 2010 we have been told that there is nothing wrong with our car and that the airbag is functioning normally. Let it be noted that there are several instances of this problem documented across the web.