To determine if a wheel hub bearing is damaged, observe the following symptoms comprehensively: If a continuous humming noise occurs while driving and intensifies with vehicle speed, persisting even when coasting in neutral, it likely indicates bearing failure; Noticeable wheel wobble causing increased vehicle vibration, particularly more pronounced at high speeds; Abnormal heat on one side of the hub when touched by hand (front wheels normally run slightly warmer but the temperature difference shouldn't be excessive), possibly due to friction-generated heat from the bearing; Additionally, reduced power transmission efficiency, extended braking distance, or steering wheel vibration may also be related. Simple diagnostic methods include jacking up the vehicle and manually rotating the tyre - a damaged bearing will produce unusual noises or rotate unevenly. Note that bearing failure directly impacts driving safety and requires immediate attention.
