850Lexus

Well I noticed that the front drivers side bearing is making some noise when I was driving over a bridge. I was wondering if it is easier to replace just the bearing or hub assembly. I have 190k on my GS for those wondering. I don't think the wheel bearings go bad on these often. I was thinking of replacing both just for piece of mind. SInce I do have so many miles I am trying to replace everything. But it seems parts are going out quicker than I can replace them lately. I spent 2k on parts at the end of last year and still counting.