NHTSA Complaint #11442063 — 2008 BUICK ENCLAVE

I purchased this vehicle several years ago used and everything was working fine. Several months later, whenever a "passenger" sits in the front passenger seat, the check airbag and seat belt system message appears in the dashboard. After the seat becomes unoccupied, the message remains on...sometimes for a couple of days, sometimes for a week, and sometimes for a month or two. Then it may stop showing the message until a person sits there again. This also happened when the vehicle was not running and the key was in my pocket. I went and applied pressure to the passenger seat and when I started the vehicle with an empty passenger seat, the message appeared again. I took my vehicle to the dealer and they were going to charge me an arm and a leg for the repair and I was thinking this should be a covered repair. What I am saying is the message appears that something is wrong and when someone sits in the seat.