Last week our 04 ES330 did its hestitation thing really bad, AGAIN. I called Lexus, did the complaint thing, asked for a specialist, waited two days and here is what she told me.
There was a new update issued in April 05 so she is arranging to get it installed by the dealer. Appointment set for 6/9.
Now of course my dealer knows I have the problem bad and was "keeping an eye out for updates or fixes". But of course I found it before the dealer called.
Ah, the pursuit of perfection!
But for those with the problem, you might want to check it out.