Programming a new key. How to?

[Super77]

New to me 99.

Buy this early model J100? [update: bought it] - https://forum.ih8mud.com/threads/buy-this-early-model-j100-update-bought-it.1357187/

I have one key with a built-in remote and one with just the chip. Both original, both work. I want to add another built in remote key. Can the ones sold on Amazon be self-programmed, and is there a good writeup here? Not seeing anything obvious in a quick search.

 

[leveeguy]

1999 Land Cruiser Key Reprogramming

My first post...the unlock button on my existing 100 series (original key from 99) key is toast (doesn't rebound when pressed) so it's useless as far as unlocking the car remotely (half the benefit of the remote FOB). To remedy this for the cheapest amount of money I bought a $30 key off amazon...

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