Thanks, Stanton, I didn't realize that locksmiths could do that too. I’ve read that the dealers are the only ones who can program intelligent keys to work with the vehicle, but I'll work with either one.
I’m still confused about whether an intelligent key has to be OEM, or whether it can be refurbished/used. Since at least one of the keys in each car is already used when it’s reprogrammed to match the newer keys, it would seem that I can just buy used keys off eBay. But I don’t know enough about the system to know whether that logic is applicable.
While we could afford to pay full retail for two more keys in our 2017 Leaf and another one in our 2015 Leaf, I’d prefer to keep old keys out of the e-waste landfill.
Other than price, is there any difference among buying:
2015 model S, bought in January 2019.
2017 model S, bought in July 2019.