Bookmarking this for my wife’s old car…
- Unlock all doors using the power door lock switch on door panel.
- Turn ignition from OFF to ON 8 times within 10 seconds, with the 8th time ending in ON. Door locks will cycle to confirm programming mode. (*ON is as far forward as you can turn without starting the vehicle*)
- Within 20 seconds press any button on first keyless remote. Door locks will cycle to confirm programming.
- Within 20 seconds, press any button on a second keyless remote. Door locks will cycle again to confirm programming. (*If you only have one remote to program skip step 4*)
- Turn ignition to OFF. Locks will again cycle to indicate end of programming mode.
Source: How To Program A Ford Focus Remote Key Fob 2008 – 2011 – YouTube