I had to replace the front driver's side bearing in my 04 Prius over the weekend. It had been growling for quite a while. While I was at it, I snapped this picture quickly to show how much brake wear goes on when you have regen. My car has a bit over 100k miles on it, and I've had it for the past 25k miles. So, its possible they were replaced, but I haven't had to touch them.
