FORD 2012 Explorer v.2 - Manual (Page 337)

Tire change procedure
WARNING: When one of the front wheels is off the ground, the
transaxle alone will not prevent the vehicle from moving or
slipping off the jack, even if the vehicle is in P (Park).
WARNING: To help prevent the vehicle from moving when you
change a tire, be sure to place the transmission in P (Park), set
the parking brake and block (in both directions) the wheel that is
diagonally opposite (other side and end of the vehicle) to the tire
being changed.
WARNING: If the vehicle slips off the jack, you or someone else
could be seriously injured.
WARNING: Do not attempt to change a tire on the side of the
vehicle close to moving traffic. Pull far enough off the road to
avoid the danger of being hit when operating the jack or changing the
wheel.
Note: Passengers should not remain in the vehicle when the vehicle is
being lifted by the jack.
1. Open the wheel chock to form a
triangle and use it to block the tire
opposite from the flat tire.
2. Loosen each wheel lug nut
one-half turn counterclockwise but
do not remove them until the wheel
is raised off the ground.
Roadside Emergencies
337
2012 Explorer (exp)
Owners Guide, 2nd Printing
USA (fus)