FORD 2013 Explorer v.4 - Manual (Page 86)

If your programmed transmitters or standard SecuriLock coded keys
(integrated keyhead transmitters only) are lost or stolen and you do not
have an extra coded key, you will need to have your vehicle towed to an
authorized dealer. The key codes need to be erased from your vehicle
and new coded keys will need to be programmed.
Store an extra programmed key away from the vehicle in a safe place to
help prevent any inconveniences. See an authorized dealer to purchase
additional spare or replacement keys.
Programming a Spare Integrated Keyhead Transmitter
Note: You can program a maximum of eight coded keys to your vehicle.
Only four of these eight can be integrated keyhead transmitters.
You can program your own integrated keyhead transmitters or standard
SecuriLock coded keys to your vehicle. This procedure will program both
the engine immobilizer key code and the remote entry portion of the
remote control to your vehicle.
Only use integrated keyhead transmitters or standard SecuriLock keys.
You must have two previously programmed coded keys and the new
unprogrammed key readily accessible. See an authorized dealer to have
the spare key programmed if two previously programmed coded keys are
not available.
Read and understand the entire procedure before you begin.
1. Insert the first previously programmed coded key into the ignition.
2. Switch the ignition from off to on. Keep the ignition on for at least
three seconds, but no more than 10 seconds.
3. Switch the ignition off and remove the first coded key from the
ignition.
4. After three seconds but within 10 seconds of switching the ignition
off, insert the second previously coded key into the ignition.
5. Switch the ignition from off to on. Keep the ignition on for at least
three seconds, but no more than 10 seconds.
6. Switch the ignition off and remove the second previously programmed
coded key from the ignition.
7. After three seconds but within 20 seconds of switching the ignition off
and removing the previously programmed coded key, insert the new
unprogrammed key into the ignition.
Security 85
2013 Explorer (exp)
Owners Guide gf, 4th Printing, November 2012
USA (fus)