There is no weight sensor in the front passenger seat. There is no notification that the seat belt is not fastened. The air bag does not work unless the seat belt is fastened. My grandchildren's weight is not registered and therefore the air bag will deploy if they are in the passenger front seat and seat belted in. I was told by Lincoln Navigator division at Ford Motor Company that this is the way the vehicle was designed and remarked that I felt this condition of 1L. No notification that the seat belt is not fastened, 2. that if the seat belt is not fastened, the airbag does not work, 3. that if my grandson is in the passenger seat with seat belt fastened, the air bag will deploy causing him injury or death. They did not seem to care and told me there was nothing they could do about it. Nothing has happened yet but this vehicle and its design is unsafe in my opinion. The dealership says they cannot fix the issue.

- Farmington, NM, USA