Brake pedal feels firm

SARAH BAKER

MEMBER
2014 MINI COUNTRYMAN
2WD
MANUAL
78,000 MILES

Hi, sometimes the brakes work fine but sometimes they do not. The brake pedal feels firm but I have to use all my force to stop the car. And then brakes work fine again. I don't know what's the problem.

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Thursday, January 17th, 2019 AT 11:33 AM

6 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,968 POSTS

Hello,

It sounds like the brake booster is going out. Can you tell me if you hear a hissing sound when driving or when you hit the brakes? If so here are diagrams that shows how to replace the brake booster below. Can you please shoot a quick video with your phone so we can hear the noise? That would be great. You can upload it here with your response. Check out the diagrams (below). Please let us know what happens.

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Friday, January 18th, 2019 AT 7:59 PM

SARAH BAKER

MEMBER
5 POSTS

I don't hear any hissing sound.

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Saturday, January 19th, 2019 AT 8:03 PM

KEN L

MASTER CERTIFIED MECHANIC
42,968 POSTS

There is a brake booster vacuum sensor that could have gone out but to be sure lets run the codes for the brake system to see what comes up. here is a guide that shows you how:

https://youtu.be/rTtAnsOlZU4

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

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