[exzrie90]

Hello, had a weird experience today. E91 2007 M47

Went around 90kmh or around 55-60 mph down a street today, started hearing what sounded like a plane engine, a old cropduster type of plane "brrrr" sound.

It came from the back of the vehicle, stopped when I reached around 70 kmh or around 40mph(?). Then started again when back to 55mph.

Once I started doing 35mph for a while, then went back to 60mph, the sound was completely gone, but I know that around highway speeds (130kmh or 80mph) the bearing has some woosh sounds.

What could be causing the brrrrr noise??