Humming noise over 50mph

[KelD]

Hi guys, just wondering if any of you have come across this before. I bought my 206cc a week ago and I'm now noticing a humming noise coming from the back if I go over 50mph. It sounds a bit like the noise you get if there is a wheel bearing issue (had that on my last car) but it was only mot'd at the beginning of march so wouldn't that have been picked up then? Apologies I know absolutely nothing about cars. It's under warranty so I'm going to give the garage a ring but thought I'd see if anyone had any ideas first?

Thanks

[gazza82]

Depends if mot was to sell it! Not all get checked as well ss they should.

Likely to be bearing, sticking pad/shoe or even tyres.

[Rivis]

The cc does make a lot more noise at speed due to the roof. I thought this was the reason why they fitted auto volume control to mask the noise.