had this horrible hum from the rear, brought into the dealer. Lord and behold, water was leaking past the ABS sensor gasket in the rear cause rear w. bearing failure.
the dealer knew this, but only fix under warranty 60000 miles or 60 months, so mine was 80K exact. Im was **** out of luck.
Just to let you guys know, check the rear sensor or if you hear a slight hum, the rear bearing will start to fail. So before it hit 60K, make those bastard dealers change them. I will post the TBS number for you guys.