One problem related to child seat tether strap has been reported for the 1999 Ford Explorer. The most recently reported issues are listed below.
There were problems with the back seat as far as not having the tether points where booster seat could be securely fit into the seat(s). The manufacturer was contacted, and stated that they will not be able to find any solution for the consumer. The dealer was contacted, and stated that the only thing that they could suggest was to purchase a new vehicle.