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1999 Jeep Cherokee Hissing Sound when brake pedal is pressed?

Tiny
SMOOCHES225
  • MEMBER
  • 1999 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 153,000 MILES
This morning while driving, I began hearing this hissing noise as if air was escpaing from somewhere inside the car, the noise appeared to be coming from the brake pedal. When I press on the gas the noise went away, when I parked the car there was still the hissing noise but it was not as loud, turned the car off and the sound died down and went away.

What could this be. Please help! Thank You!
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Friday, December 14th, 2007 AT 9:37 AM

2 Replies

Tiny
MATTTTAM
  • MEMBER
  • 2 POSTS
Check your brake booster if equipped with one when it goes out it starts to sound like leaking air
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Thursday, January 24th, 2008 AT 8:11 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
I agree with MATTTTAM, the brake booster needs to be replaced. Here is how to replace the brake vacuum booster. Check out the images (below). Let us know if you need anything else.
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Thursday, October 3rd, 2024 AT 5:29 PM

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