It does sound like a wheel hub, bering, knuckle, assembly... I too have the same issue. Iv been on the hunt for a new assembly, but I have thrown a bit of a curve ball. Does anyone know the difference between American made and Japan made models and their wheel hubs? Or is there a difference, besides the extra $200? Now, I know Japan is held to a higher standard in their machining tolerances, and I can understand a price difference for that, but is there and physical diffs? Are they interchangeable? I need to replace my right rear on my 04 330 and don't know what part to get. Any help would be great!