Hi
I can here a sucking noise all the time, except when I touch the brakes. Listening in the footwell (when stationary!) it is definitely coming from the bellows where the brake pedal pin goes into the servo, as I can alter the noise by touching the bellows.

So, is it supposed to do this? I suspect not, as I have only noticed it recently. The brakes work fine. What is wrong and how do I fix it? Is it a new servo?
Thanks

Jon