If you're referring to a buzzing noise when moving, that IS caused by the bearing. The torque on the axle nut is critical because that's what holds the bearing together. The most common cause of repeat failures is setting the vehicle's weight on that bearing before the nut is fully tightened. That will instantly damage it but the noise might not be audible right away.
Some people on this site also believe part of the problem is cheap Chinese parts but I don't have any first-hand knowledge of that.
Tuesday, April 14th, 2020 AT 6:14 PM
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