Wiki - Program Your Own Spare Key Fob

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If you’ve considered adding a backup key fob for your Bronco (not Bronco Sport), you might want to do so before you’ve lost or damaged one of the two original fobs.

While keyless fobs like these often require dealer programming that can be extremely expensive, Bronco allows you to program up to two additional key fobs on your own - so long as you have the first two key fobs present. If you only have one, a trip to the dealer is likely your only recourse.

The process is outlined in the owner’s manual:

key_01
key_02

All you’ll have to do is source a compatible fob, follow the above steps, and if desired, have the physical key blank cut by a locksmith. I’ve received quotes of about $25 for blade key cutting. I have one fob set as a “valet” fob - key blade is uncut, and the key itself is programmed with all MyKey functions activated.

While I concede sticking with OE parts is probably your best bet for a reliable backup fob, if you’re feeling frugal, I will concede I’ve successfully programmed an extremely inexpensive non-OEM fob…

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This is a terrific suggestion! What makes it even cooler for me is that I have a key that was left over when my last vehicle was totalled. I had a Ranger. When it was totalled I ended up in my Bronco. The key fobs are identical so it should be easy to program. I may have to forego the physical key however.
A cheer for serendipity!

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Caveat - I don’t know if this will work with keys previously programmed to another vehicle.
That may require dealer programming. I don’t know for certain.

If that other fob had never been programmed to your Ranger, then it most likely would.

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