I wanna know how you can tell which wheel bearings are going. Is there a way to tell without taking off the wheels. Should these be replaced in pairs, all four . I think they are all independant. How much are wheel bearings , I was quoted $47 Dollars Canadian , is this good , or can I get it cheaper. Are they hard to change, I've got a german dictionary-Can I do them myself , or is it too complicated to do.If so, how much have any of you guys paid for labour of this. I am in Canada , keep in mind, But I know you guys down south can help me here.