See this website for information on the 2004 ES300 transmission lag. I had Lexus do the modification a couple of months ago and the results have been great. The lag is gone. The dealer told me to run the car hard and not baby it for the first couple of days as the transmission learns my driving style. BTW - The bulletin recommends premium fuel for "optimal engine performance" but I am using regular fuel with no problems.
- posted
18 years ago