U really need the new key , so that when it’s programmed it will over write any existing keys
Plus there is a limit of how many times u can reprogram a key
U don’t want to leave a vehicle with no key programmed into it, as if does get nicked the ins company will refuse to pay out as u left the vehicles security completely open
I was under the impression that the OP must now be using key2 so have key1 removed till key3 arrives then reprogram new key? Key 1 will have to be removed at some point.
I only asked about Gap as the bedtime reading shows you can reprogram and check how many keys in the system, Incase some valet/garage has adding another key for later not so nice reasons, but doesn’t say how to remove.
I don’t expect the OP to go out and pay £400 for diagnostics at his age( although you never know) just to do a key.
J