1. Park your car in a safe location and turn off the engine.
2. Safely raise your car using a car jack and jack stands or a vehicle lift, ensuring it's stable and secure.
3. Locate the wheels affected by the humming noise, typically in the front or the back.
4. For each affected wheel, visually inspect the wheel bearing area, looking for any visible damage, excessive grease, or a loose lug nut/bolt.
5. Rotate the wheel by hand (make sure the car is in neutral and parking brake is on) and listen carefully for the humming sound. If the sound becomes more pronounced or changes when you turn the wheel in one direction or the other, it may indicate a faulty wheel bearing.
6. If the sound persists, proceed with further checks:
>- Grab the tire at 12 and 6 o’clock (top and bottom) and rock the wheel back and forth. If there is significant movement, it may indicate play in the wheel bearing.
>- Place one hand on the spring/strut above the wheel and the other hand at the bottom of the tire and aggressively shake the tire. Any movement likely means the wheel bearing is bad.
7. Repeat the process for the other affected wheels.
8. If you confirm a faulty wheel bearing, it's recommended to take the car to a trusted mechanic or automotive workshop for proper diagnosis and replacement of the faulty bearing.
