My driver's side wheel bearing is worn out. Been hearing a humming sound for about three weeks now.
1. How long can I go without changing it?
2. New ones cost about $600 (each)/used one for about $150 (from scrap yard). Can I make do with a used one? How do I know if it will last?
3. Can I just change the bearings, or do I need to change the flange aswell?