2010 RX350 53k miles and had to have front wheel bearings replaced. Put new tires on not to long ago and thought noise was from tires. Rotated tires and noise still there, brought car into Lexus dealer just to check it out before I made a big deal about it with tire guy. Can't remember last time I heard of bad wheel bearings. glad it was covered by warranty.

 

The 2nd generation RX had some bearing failures....

 

Really? thats crazy! Im glad they fixed it under warranty.