Bad wheel bearing
Could be a bearing going bad.
if its while your driving it could be wheel bearings
bad wheel bearings will do that, usually in the front.
you have to have more then one window down when you are going down the road or its a horrible nosie.
it does that because it has a generator which makes the engine makes these sounds
No. The loud humming noise could be a wheel bearing going bad and it could damage the ABS sensor if allowed to continue.
There are a couple of reasons why a 2001 Audi would make humming noises from the back while it is being driven. The first thing to check is the tires. If the tires are fine, check the wheel bearings.
yes and yes
this is supposed to be a library work hahaha
It's "N" ur supposed to tap it repeatally while driving.
Just throwing it out to have your wheelbearings checked, humming can mean that they are about to break! if it keeps gettig louder and louder, the longer you wait, it could break while you are driving !!