Two problems related to side/window air bag have been reported for the 2012 Subaru Impreza. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Subaru Impreza based on all problems reported for the 2012 Impreza.
Problem with the passenger side air bag. When passenger seat is occupied the air bag will randomly turn on and off. Occurs with both light and heavy passengers. Subaru service retrieved a code b1650 from computer. Subaru estimated cost to replace is $300. 00 for control unit replacement.
Passenger side airbag turned off with adult sitting in the seat. Sensor replaced by dealer in July 2012, brought back August 2012 with same problem. Was informed by the dealer that the malfunction was caused by either an electronic device (cell phone) on the seat or the sensor may have been wet. I contacted Subaru north America with this explanation and they confirmed that the new sensoring technology used in the Impreza, was sensitive to electronic pulses and also moisture and possibly sweat. They confirmed that the airbag may turn-off and would not be activated during a collision. Subaru now considers this matter closed.