Hi everyone! I had a 06ul with 25k miles, bought it from a co-woker( he moved to overseas). Last few weeks, my rear air suspension have the mind of it own. It's saged all the way down, when it doing that, the height sensor light and afs light is flashed. Then its just go back-up by itself sometime
Anyway! I took it to Lexus shop, they said the Rear Right Height Sensor is not working. Part on the receipt(sensor sub-assy, height) cost $393.00
plus labor $275.00 .
So is there anyone in club had this problem before on the ul? At miles? and what cost?
And is there anything else that I would expect to happen on my air-suspension in the future?

ps. my car is out of warranty, original purchased on Sept,05 .
Thank you every one who response!