Ford 2011 Explorer Owner's Manual page 232

Follow all instructions provided by the manufacturer of the booster seat.
WARNING: Never place, or allow a child to place, the shoulder
belt under a child's arm or behind the back because it reduces
the protection for the upper part of the body and may increase the risk
of injury or death in a collision.
Child restraint and safety belt maintenance
Inspect the vehicle safety belts and child safety seat systems periodically
to make sure they work properly and are not damaged. Inspect the
vehicle and child seat safety belts to make sure there are no nicks, tears
or cuts. Replace if necessary. All vehicle safety belt assemblies, including
retractors, buckles, front safety belt buckle assemblies, buckle support
assemblies (slide bar-if equipped), shoulder belt height adjusters (if
equipped), shoulder belt guide on seatback (if equipped), rear inflatable
safety belts (if equipped), child safety seat LATCH and tether anchors,
and attaching hardware, should be inspected after a collision. Refer to
the child restraint manufacturer's instructions for additional inspection
and maintenance information specific to the child restraint. Ford Motor
Company recommends that all safety belt assemblies in use in vehicles
involved in a collision be replaced. However, if the collision was minor
and an authorized dealer finds that the belts do not show damage and
continue to operate properly, they do not need to be replaced. Safety
belt assemblies not in use during a collision should also be inspected and
replaced if either damage or improper operation is noted.
For proper care of soiled safety belts, refer to Interior in the Cleaning
chapter.
WARNING: Failure to inspect and if necessary replace the
safety belt assembly or child restraint system under the above
conditions could result in severe personal injuries in the event of a
collision.
2011 Explorer (exp)
Owners Guide, 1st Printing
USA (fus)
Seating and Safety Restraints
231