Emin
I am a UK owner and had a similar problem to you last year at about 21000 miles. My post on the UK forum was as follows:-
Bought my '05 Rx400h in May this year (2007). What a great car.
Took a trip down to Assisi in Italy in September. 1,200 miles each way. Arrived at destination fresh as a daisy!
However, Last Saturday night I arrived home and when I went to turn onto the drive - no power steering!!!!! Big effort and straining muscles but managed to park on the drive.
Rang Lexus Milton Keynes in the morning (Sunday) They arranged for car to be picked up that lunchtime. Went with it on the recovery vehicle and was loaned a GS450h. (Interesting comparisons!) Had phone call Monday afternoon to say car was ready to pick up. Sean said it was faulty sensors in the power steering but they had replaced the complete steering rack under the warranty. (£3,000 worth of parts!)
How's that for service? Well done Lexus Milton Keynes.
My history so far
RX400h SE-L
30000 miles (bought car from Lexus Milton Keynes as an ex demonstator with 14700 miles on the clock)
31.5 MPG average (but our UK gallons are bigger than yours in the USA!)
Best consumption so far 38.5MPG on a 100 mile trip on country roads from Colchester to Milton Keynes
Only the one problem with the steering rack (see above)
Great car
The dealer loaned me a KIA Sportage!!!! (they were out of Lexus loaners!)... My kidneys hurt after 5 days... (rough ride).
Sounds like you get better service than my 2 local Lexus dealers.. I bought mine from Rockville Centre Lexus and when I called to tell them about my problem, they said bring it and we'll assess it. I asked if they had loaners or a way for me to get back and the lady said No loaners, and you need someone to pick you up!! I called Bayridge Lexus and they at least said that they'll assess the car and then put me in some sort of wheels if they don't have a loaner! At least they cared enough to give me a car, any car!