1996 Audi A3 • 138,000 miles

Just wondering if anyone has any ideas regarding a low humming noise. This has just started in the last couple of days. When you get to about 30 - 40mph the hum kicks in. It is quite low but is more obvious when you slow down. Any ideas? Is it safe to drive still at the moment?
Ann Robins
February 25, 2012.

That's typical of a worn front wheel bearing. Common on any brand of car. It's irritating and will get worse but okay to drive it like that. Often the noise will change when turning slightly such as when changing lanes. The weight shift affects it.

Feb 25, 2012.