Buzzing or humming rear passanger tire

Rub your hand over the tread and try and feel for cupping or uneven tread patterns. This will create alot of road noise. If not, have your wheel bearings checked.

ANSWERS: Oil Loss, Buzzing Noise, ETC. - Nissan Forum ' Nissan Forums

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Buzzing noise at 2000-3000 RPM - Nissan Forums : Nissan Forum

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Oct 28, 2003 - 6 posts - ‎3 authors
The "buzzing noise"; I can tell that I am not alone in having this problem but has someone figured out ... I fit does, that eliminates the brake rotors, tires, wheelbearings, CV's etc. ... BUT with an Altima it is probable the pre-cats. Loud humming noise when driving
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That could be anything - from tire noise to bearing noise to the passenger in the rear seat! Where does the noise seem to be coming from - front? rear? left? right? engine? Is there anytime that the noise changes or goes away? Gets louder or softer? All these things help us to help you. Year and engine size are helpful too.

Try jacking the vehicle up and testing. If noise still present then possible wheel bearing failure.

I don`t think you have cv axles in the rear of that.My guess would be wheel bearings could be grinding. Donut spares are strickly to be used for short periods of time and not to be driven at any higher rates of speed. Some damage may have occurred during the actual incident when you had the flat initially.Damage to the rear axle itself,

It sounds like a possible wheel bearing failure.Get it checked at a local repair shop ,or possible loose bearing hub.

make sure your tire is ok and is not r ubbing on anything and check your drivetrain ujoint`s etc.

Chances are it's the tires rather than the engine.
Does the hum diminish if you back off the accelerator? If yes, then look at rear axle pinion bearing. If no, then feel across the tires. They should be smooth across. If they're rough, they will make a loud howling noise.

joined a free VW forum site and received the solution next day. thanks, peter