Something common you can check for (and this applies to pretty much all cars) is crap under the front seats. This can put tension on, or cut/break, the airbag wires for the seat position sensors and/or the seatbelt pretensioner and/or the side-impact bag if equipped.

x2 on Margies suggestion to call the dealer. However, getting a 17 digit VIN correct over the phone is pretty difficult.

1990 Montero RS (In pieces... for now)

KG6VNX