I purchased a back up engine computer for my wife's 2000 Lexus RX 300 and now find out that it would not work unless reprogrammed for her keys or I need the keys that match that engine computer.

Can anyone help point me to a source that can reprogram an engine computer to match our current vehicle???

 

Here's one of many:
http://www.toy-lex.com/

 

Thank you Mikey, just got back from NJ yesterday it was very cold.