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Hissing Brake Noise!

  #1  
Old 09-05-2009, 12:31 AM
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Default Hissing Brake Noise!

Hi, when i drive my s80 2001 model (non - turbo) there is a loud hissing noise coming from the bottom where the brake pedal is after it has been depressed. And also, rarely the pedal also sometimes tends to stay depressed 2/3 of the way. What can this be?

Thanks.
 
  #2  
Old 09-05-2009, 07:06 AM
tech's Avatar
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That is usually a bad brake booster.
 
  #3  
Old 09-05-2009, 07:49 AM
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