Unbelievable how this 2007 Lexus Rx350 is falling apart, poor quality parts with only 47,472 miles (Wheel bearings should last the life of the car). The loud humming noise been going on for awhile and I first thought it was coming from the front left due to vibration in the front end. Anyway after fixing the front end vibration it was easily isolated & the part cost $579.43 from Lexus plus cost of removal & installation. I think it's better to stay away from the Lexus brand over price & now Toyota/Lexus quality is on the decline. My rear wheel could eventually fall off and that would be a nightmare if it wasn't discovered as early. Not in love with Toyota/Lexus anymore it's absolutely time to move on.