How to make a duplicate transponder key?

[CTScott]

Originally Posted by Exiwolfman

Yes I have done one on a sienna ..same problem person lost all but one key no masters .
In order to do this I had to log with Toyota and its full of security as in they need my name , blood lol etc after that I get the code that basically resets the whole security and at this time u can load blank keys as ECU is reloaded but like I said only Toyota employe can do this and one has to be verified .
But this is completely different procedure from just adding keys with that u need master for simple add on of lost key with out special security protocol .


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That makes sense. So, it's definitely not a DIY. I wonder if the OP's dealer is charging the $400 for that service or if they are doing the service manual route?