Hi All,
I'm new here and am glad I found this site!
I just had this happen, I just inherited a 2001 GS 300 and no one knows what happened to the master key.
Went to a dealership who wanted $300, $250 for the key and $50 to 'program' it....
I went to sparecarkeys.com
I got 2 keys for $19.95 each and they cut them for me for $25 each. Check out the website for info for what you need,
you'll have to show proof it's your car or have the factory key code, AND either a master key or the emergency card/key transponder to program in the new key(s), a valet key won't work, I tried ;_
They also sent me SUPER EASY instructions on how to 'program' the new keys into the car.
I had them both working in a couple of minutes.
I was really happy as I sent my order in on a Friday afternoon and by the next Monday I had a notification
that they were shipped and had them in my hands that Wednesday.
I HIGHLY recommend them to anyone!!!!!
Good Luck