Don't know if you found this out yet, but it is definitely one of the front hubs. The hub/bearing assembly also has the ABS sensor attached, so if any of the three components fail, it needs to be replaced. I have to replace mine about every 40K miles (due for one now, in fact).
It's recommended to do them both at the same time, but I haven't.
Thursday, September 8th, 2011 AT 1:04 AM