I have a 2000 RX300 with 78K miles. A light came on (light 14 in the instrument cluster: malfunction indicator lamp).
Brought car to Lexus dealer and was told we needed new engine. With proof of at least one oil change per year since ownership, Lexus has offered to replace engine with our purchase of the 4-year maintenance package (about $900.00).
I read some background on this in Automotive News (autonews.com, Feb 8, 2002) and apparently there is a sludge issue with Toyota 6-cyl engines used in the Previa and RX.
I feel that Lexus is making a good offer: basically they'll replace the engine in exchange for the $900.00 4-yr. service.
What is your experinece with this problem?