Hi all, anyone know how big a job it would be to change the brake servo on a 2.0l golf (im not a complete novice, but wondering how much stripping i will have to do to get to it!). Im getting a hissing sound just above the brake pedal in the car. Took the plastic cover off and when when i push the rubber gaiter it makes the hissing noise. Seems that when i push the gaiter towards the engine the hissing stops so also wondering if anyone has heard or a problem like this before and whether there is a more simple fix to it. Brakes are ok but pedal wont pump really hard.