2005 RX330 AWD bought in Danvers, MA for about $40K in Dec 2004. I have about $15K miles on the car now.
Problem 1 - Car would lag at certain speeds. It would brought back to the dealer and said that it was a common problem on the car. I am not car savy but think it is the transmission problem a lot of ppl are having problems with. Anyways, they "fixed" it but honestly, it didn't do much. Obviously it was covered under warranty, so no cost to me.
Problem 2 - Driver seat track made noises. The dealer replaced the tracker and again, at no cost. The problem was fixed.
Problem 3 - Headlight turning sensor did not work, the AFS light would flash at times saying it was off. Brought it to the dealer and they replaced the whole sensor at no cost. The problem was fixed.
Problem 4 - Rear would make a thumping noise everytime I went over a bump on the road. Brought it to the dealer and the noise could not be duplicated. They decided to take everything off (spare tire, tools, etc.) and tighten everything back. This cost me $60 for man hour I guess. I have yet to hear the thump.
As for maintanence, it has been quite expensive. I bring my car into the dealer for the 5K oil change and it would cost $150 but for the $15K check up, it cost me $500! I was quite surprise at this and next time will ask them about the cost and tell them to only replace and change things only if it is necessary to keep my warranty.
Overall, I am happy with the car but a bit disappointed with all the problems I have seen within a year of the car. I had a higher expectation of Lexus before this but still think it's one of the top brands out there.