# Brake sounds

**URL:** <https://community.cartalk.com/t/brake-sounds/19679>\
**Category:** Maintenance/Repairs\
**Created:** [September 17, 2008, 7:34am UTC](https://community.cartalk.com/t/brake-sounds/19679 "2008-09-17T07:34:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![emilystrange](https://avatars.discourse-cdn.com/v4/letter/e/c77e96/32.png) [@emilystrange](https://community.cartalk.com/u/emilystrange)\
**Post date:** [September 17, 2008, 7:34am UTC](https://community.cartalk.com/t/brake-sounds/19679/1 "2008-09-17T07:34:28Z")

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I have a 2002 saab 9-5. Recently I hear this air blowing sound when I’m driving. When I step on the brakes, the sound stops, when I release it comes back again. Can anyone tell me what this is before I bring it in and if it’s dangerous?  
  
 Thanks,  
  
 emilystrange

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**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\
**Post date:** [September 17, 2008, 10:49am UTC](https://community.cartalk.com/t/brake-sounds/19679/2 "2008-09-17T10:49:40Z")

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It sounds like a leak in the vacuum system. This could be a safety issue and should be addressed now. It could get worse suddenly and you might loose power assist to the brakes and the brakes will require a lot more pressure to stop your car.

It may be as simple as a loose vacuum line, but it also may be a more expensive part.