Two problems related to warning light on have been reported for the 2012 Nissan Maxima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Nissan Maxima based on all problems reported for the 2012 Maxima.
On Dec 12, 107 my 2012 Maxima had a side airbag sensor replaced (dealer replaced air bag control unit fp-number 98820-9n09c). The airbag light on the passenger side would not go off after the car started. The warning light stayed on regardless if the car was still or moving or whether there was a passenger in the car or not. In September of 2018 the exact same warning light returned which makes me think that there is a larger airbag problem at hand.
The contact owns a 2012 Nissan Maxima. The contact stated that the passenger side air bag off warning light illuminated whenever a 120 lbs passenger occupied the seat. The vehicle was taken to the dealer where it was diagnosed that the passenger side seat air bag sensor was defective and needed to be replaced. The manufacturer was made aware of the failure. The vehicle was not repaired. The failure mileage was 36,000.