The Mégane II Owners' Club

Not sure if this is a fault or just another Megane quirk but recently we have noticed a constant sound of hissing/ leaking air when driving from the passenger side. When the foot brake is pressed the noise disappears and reappears when the pedal is released. I presume this is the brake servo but is it normal to hear this? The car passed the MOT 2 days ago with no advisories' any ideas please?

Well, I've never heard it in mine so I'd suggest that it is not normal and that you have a leak.

Did you ever find out what this was as mine is doing exactly the same