Although your noise description can indicate a bad bearing you will want to be sure of your diagnosis since it could easily be be many other problems associated with your suspension, tires, or CV axle. Finding out if it's your bearing should be pretty easy though. Good noise indications are a whine ...

Bad ball joints/control arm bushings can cause that kind of wear. I would suspect that first since you did replace the one control arm already, maybe you didn't notice the wear before you replaced it.

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