Headlights problems of the 2013 Nissan Pathfinder

The vehicle has had problems since I got it. Im fed up of going to the Nissan to fix something every few weeks. The headlight bulbs were replaced on 2/4/13 the day after I got the vehicle. The right side stopped working so the socket was changed on 2/7/13. On 5/2/13 a factory recall was completed. On 7/30/13 the wind shield washer pump failed and the part was ordered. Same day 7/30/13 passenger air bag light would not go off while adult is in seat. Nissan performed a zero point reset and light went off. On 8/24 washer pump was replaced. Around 9/30/13 the passenger air bag light would not go off again with adult in seat. On 10/15/13 they replaced OCS sensor for passenger air bag. On 10/20/13 the airbag light stays on while an adult is sitting in the seat. I don't know what to do again. Nissan is asking me if im sitting well on the seat or maybe im not heavy enough. Im 180lbs. Just imagine if my little sister (a minor) is sitting in the seat. This is a danger to my family and I really need some help.