# Saab brakes

**URL:** <https://community.cartalk.com/t/saab-brakes/46397>\
**Category:** Maintenance/Repairs\
**Tags:** saab, 9-5\
**Created:** [March 21, 2010, 1:50pm UTC](https://community.cartalk.com/t/saab-brakes/46397 "2010-03-21T13:50:03Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![saab1000](https://avatars.discourse-cdn.com/v4/letter/s/e36b37/32.png) [@saab1000](https://community.cartalk.com/u/saab1000)\
**Post date:** [March 21, 2010, 1:50pm UTC](https://community.cartalk.com/t/saab-brakes/46397/1 "2010-03-21T13:50:03Z")

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My saab makes a sound like air coming out of a balloon when you brake sometimes… It usally happens at lower speeds and almost always after driving at highway sppeds and then coming off exit and driving a little ways. It is not a squeal or a grind… low grade whitles like air coming out of a ballon.  
  
 I assume a vacumn leak… but mechanics can’t find it

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [March 21, 2010, 2:44pm UTC](https://community.cartalk.com/t/saab-brakes/46397/2 "2010-03-21T14:44:48Z")

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It sounds (no pun intended) like your power brake booster has a leak.  
Does the firmness of the brake pedal change as you depress it?

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**Author:** ![missileman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/missileman/32/1366_2.png) [@missileman](https://community.cartalk.com/u/missileman)\
**Post date:** [March 21, 2010, 5:32pm UTC](https://community.cartalk.com/t/saab-brakes/46397/3 "2010-03-21T17:32:17Z")

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I agree with the leaking power brake booster. A good mechanic has ways of testing this. Find a good mechanic.