One problem related to transmission gear slipping has been reported for the 2005 Lexus ES330. The most recently reported issues are listed below.
Leased Lexus 2005 model Es330, there is a problem with the transmission where therewas a delay in shifting and the engine raced at 4000 rpm s before the transmission downshifted very hard. This acted like a major transmission slippage and a hard shift, the car hesitates as you are pulling into traffic and in a split second I have almost been hit from behind because the car did not respond normally. Lexus admitted that they have this problem in the 2004, 2005 and 2006 models. Dealer had a service rep look at it and state they cannot put anymore computer programs on the car and it's driving as it was designed.