It could possibly be the wheel bearing unit. I had the same thing on one of my front wheels. It sounded like an airplane taking off. Auto Zone has them for around $100.00 . Good Luck to you.
Could be many things but a front wheel bearing/hub assembly going bad comes to mind. Scalloped worn tires can give you a humming noise also.
is the humming coming from the front end of the vehicle? i have a 1996 explorer with the same issue. yes the noise come from the front but not all the time seems to make the humming noise when it gets hot
Possibly the wheel bearing.
1999 Mercury front and humming noises can because by several things. Tire noises are the most common cause. A tire that is not wearing properly can cause a humming noise.
radiator fan.
Humming noise on the front passenger side of a 1997 Ford Explorer XLT may be due to a bad tire. Try to jack up the tire and spin it by hand to see if the noise is there.
Answer Humming noise from front endI just got my car fixed with the same problem and it was the wheel bearing and it is gone. Was it a fwd car?
Worn passenger side front wheel bearings.
i would first balence the tires then try replacing the wheel bearings if the noise is coming from a specific area on the car In example left front, right front etc.
Could be a bearing going bad.
need to get your wheel bearings checked
when the pump is going out it will make a humming noise from the bearings even if the resivore is full.