Camshaft Position Sensor problems of the 2012 Subaru Impreza

2012 Impreza. . . Bought new, nothing but headaches. All problems listed below occurred before I had even owned the car 2 years. 1. At 8-10k miles - while driving car would randomly turn off passenger airbags and illuminate no passenger seatbelt on the dash. Took car to dealer 3 times. Dealer refused to fix as the "error was not stored in the computer. " suggested cell phone was the problem even though cell phones were not near the seat during each of the multiple incidents. I had to complain to corporate who told the dealer to replace the sensor in the seat. No problems since. 2. At 15k miles - multiple times car would turn on check engine light and traction control light simultaneously. First incident dealer said "dirty camshaft sensor. " second incident I had to refuse to take the car back until they actually fixed a part. Dealer kept car a whole week and made calls to corporate engineers. Tests revealed it was a "failed oil pressure valve. " replaced the part and no more problems. 3. At 25k miles - bad battery. Had to replace when car was only 1 year and 10 months old.