S80 2003 Brake pedal noise

BG851 · Post by **BG851** » 29 May 2009, 18:41

HI, Im getting an intermittent noise in my cabin while driving. It is a high pitch squeal (like when you fill a balloon with air and squeeze the end as you let the air out). It stops when the brake pedal is stepped on.Sometimes it comes back as soon as the pedal is released sometimes not.The car feels fine and no idiot lights. I also had a problem last week that might be related to a vac pump? Is the car safe to drive?Any help will be greatly appreciated. Thank you.

Post by **vegasjetskier** » 29 May 2009, 19:08

BG851 wrote:HI, Im getting an intermittent noise in my cabin while driving. It is a high pitch squeal (like when you fill a balloon with air and squeeze the end as you let the air out). It stops when the brake pedal is stepped on.Sometimes it comes back as soon as the pedal is released sometimes not.The car feels fine and no idiot lights. I also had a problem last week that might be related to a vac pump? Is the car safe to drive?Any help will be greatly appreciated. Thank you.

It might be the brake pads and/or rotors. You should check them or have them checked.

BG851 · Post by **BG851** » 29 May 2009, 20:54

The sound happens when the car isnt moving.It sounds like an air leak.The problem is not by the wheels its only inside the car

Post by **mvsuzr** » 30 May 2009, 23:09

It might be a brake booster failure.

See this post:
https://www.matthewsvolvosite.com/forums ... &sk=t&sd=a

m_med · Post by **m_med** » 08 Jun 2009, 12:25

yep. thats exactly it. it is the brake booster. its a pricey fix though...