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Do I have a brake booster issue?

Tiny
SAMSABI
  • MEMBER
  • 2013 FORD EDGE
  • 3.4L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 77,670 MILES
Hello, just wanted to ask your opinion regarding my brake issues. I noticed the issue when reversing out of my garage that the brakes don't work well but after a bit of driving they appear normal but sometimes it feels a bit heavy. I've been reading that it could be the brake booster. I have 2 year old rotors and pads, so I don't believe its that.
Long story short, my vehicle has an extended warranty on the brake booster, bulletin: 13N02. I just wanted to know if this is a symptom of a failing brake booster or master cylinder? The vehicle will be looked at the dealer but I want to make sure they don't blame it on something else, replacing everything like maniacs.
I tested the pedal myself, and I did hear some hissing noises, see video attached. Thanks for your help!
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Tuesday, June 8th, 2021 AT 1:14 PM

3 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
The video did not attach but if you are hearing a hissing noise and notice some lack of stopping power then this is normally a booster issue.

You may just have a leak in a booster vacuum line so we can use this guide to try and check for a leak. This booster is run off manifold vacuum so it should raise the RPM when you find the leak.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Below is the test from the manual that will help but this is pretty general.

However, if you have a warranty on the booster I would take it in unless you find an obvious issue with this.

Please let us know if you have questions or what happens with this. Thanks
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Wednesday, June 9th, 2021 AT 3:47 PM
Tiny
SAMSABI
  • MEMBER
  • 2 POSTS
Hi KASEKENNY1, I uploaded my video again in my reply hopefully users can see it. The dealer confirmed that it was the booster and replaced it under extended warranty 13N02. https://ford.oemdtc.com/2280/13n02-extended-warranty-coverage-on-brake-booster-2010-2013-ford-edge-lincoln-mkx
Brakes are working normally. thanks for your input!
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Saturday, June 12th, 2021 AT 4:57 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Great info. Not only I am glad that you are taken care of but I am glad you updated us as I am sure that info will help others in the future.

Thanks for using 2CarPros.
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Sunday, June 13th, 2021 AT 8:33 PM

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