2011 Mazda 5 3rd key cannot be reprogram?

:
Mazda 5
I have 2 original key and watched the online tutorial that I can program the 3rd key (just the key itself without the remote, it should be standalone?).

Tried many times, the ECU won't register the 3rd key. Some online shop says newer Mazda 5 key can't be programmed without the key reset tool.

Somebody knows about this?

 
Back