PA460AWD

I have the same issue with my 2011 AWD LS 460. It is really annoying especially in the "flagship" of the Lexus fleet, I have leased 4 GS's in the last 12 years and have not experienced anything like this. It has been back twice for tire balancing, but it has not helped. It started off being especially noticeable between 38-40. Now it seems to be spreading out to a wider range 36-42 mph. My dealership took wheels off a brand new LS and tested my car, no improvement. They tested both the Bridgestone tires that came on my car as well as a set of Dunlops that were on another car. I have driven two brand news 2011 LS AWD's as well as a 2012 AWD that were all untitled and still on the dealers lot and all of them have the same vibration issue as my car. Finally my dealer called in the regional Lexus technician who examined my car. But they did not tell me what he found or reported. I am very discouraged because Lexus has not acknowledged this is an issue, therefore there is no fix in the works yet. But I believe this to be a real flaw in the late model LS AWD vehicles.

I leased a 2011 LS 460 AWD in March 2011. Within the first month I noticed a vibration, usually at highway speeds. The dealer fworked on it and it seemed good for several months. They told me that 3 out of 4 tires needed to be rebalanced. Months later, When the car reached 8,000 miles, I noticed a vibrations again, this time between 38-40 mph. The dealer brought it in and rebalanced all the wheels. That did not resolve the problem. They took the wheels off a brand new LS and tested it before they gave it back to me. That did not solve it either. They called the regional Lexus factory rep and asked me to bring it back a couple of weeks later for him to examine it. The next day I was called back to test drive my car. The service manager and the master mechanic explained to me all the things they attempted over the 4 days they had my car over two weeks. First I drove a brand new 2012 LS AWD with 21 miles on the odometer. It had the same vibration as my car only at slightly higher speed of 40-42 mph. Then I drove my car the vibration was obviously still I noted my car has Bridgestone tires while the '12 had Dunlop tires on it. My conclusion is, the problem is not tire related, but a manufacturing defect. I believ that it is up to design engineers in Japan to find a fix for this probelm. After reading comments in this forum I suspect this issue has been known by Toyota for at least two years and I am very disappointed that they have not resolved it. For the record, I have leased 4 GS Lexuses from this dealership in the last 12 years. Up to now I have been totally happy with my cars and the good people at my dealership. I believe that they have done everything in their power to fix my car. I hope that Lexus finds a solution to this problem in the very near future. I have 26 months left on my lease and right now I dread drving this car every day. For $73,000 I expected a lot more then what they delivered.