2017 CX5 Rear Brake Problem....
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Junior Member
Joined: Sep 2020
Posts: 2
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From: Welland
2017 CX5 Rear Brake Problem....
First Post... Desperate... So, I did it , screwed up the new rear brake and rotor install on the ‘17 CX5. I was not aware of the significance of the emergency brake (electric) and the need to put it into service mode BEFORE I started the disassembly. I got the driver side rotor and caliper off, removed the pads and realized I could not get the piston to seat back for the new pad install. This is when I learned on YouTube... of all the BS with the emergency brake and piston retraction procedure. Anyway, dumb *** me activated the emergency brake button and it pushed the piston out of the cylinder. Yeah, we’re doing a great job so far. I took the caliper off the car and onto the bench to get the piston back into the cylinder and seat the piston using the adjustment on the backside of the caliper.
You get the picture, a total hack job. I did get the pistons to retract manually after removing the electric motors, but I have no idea what I was doing with the adjustment of these internal mechanisms inside the piston... Anyway, I completed the new rotor and pads install, I put everything back together, bled the brakes and prayed...
Didnt work. I had no idea how to get the Electric parking brake activation switch inside the car to work normally again. Also, the brake pedal is spongy and goes almost to the floor before enough pressure is built to apply brake pressure on the rotors. I initially got the emergency brakes to activate, but then they locked up.... Somehow, I was able to play around in the cabin and get the emergency brakes to release. I left them alone after this...
So, I have a car that is totally parked until I can get the rear brakes and brakes in general as well as any codes, computer issues, etc cleared up.
My question revolves around the spongy brake pedal. If I drive the car slowly, and apply the brakes, the pedal travels almost to the floor and then there is just enough pressure to activate the brakes. Pre brake tear down, no issues whatsoever with the brake pedal, master cylinder etc. The car only has 35k miles on it. Did I not bleed the brakes enough? I watched the air come out of the one caliper that I had completely apart (driver rear side) and it then flowed with brake fluid nicely. The other side was not taken apart and the fluid flowed properly. I did not bleed the front brakes.
What do I do about my screwup on the emergency brakes? I’m afraid to activate them again for fear of a lock up. For now, trying to address the spongy feel is the priority. I will go out tomorrow and pull the wheels off and try again...
Any helpful hints mich appreciated, I know I screwed up and will learn from this mistake... Cheer’s
You get the picture, a total hack job. I did get the pistons to retract manually after removing the electric motors, but I have no idea what I was doing with the adjustment of these internal mechanisms inside the piston... Anyway, I completed the new rotor and pads install, I put everything back together, bled the brakes and prayed...
Didnt work. I had no idea how to get the Electric parking brake activation switch inside the car to work normally again. Also, the brake pedal is spongy and goes almost to the floor before enough pressure is built to apply brake pressure on the rotors. I initially got the emergency brakes to activate, but then they locked up.... Somehow, I was able to play around in the cabin and get the emergency brakes to release. I left them alone after this...
So, I have a car that is totally parked until I can get the rear brakes and brakes in general as well as any codes, computer issues, etc cleared up.
My question revolves around the spongy brake pedal. If I drive the car slowly, and apply the brakes, the pedal travels almost to the floor and then there is just enough pressure to activate the brakes. Pre brake tear down, no issues whatsoever with the brake pedal, master cylinder etc. The car only has 35k miles on it. Did I not bleed the brakes enough? I watched the air come out of the one caliper that I had completely apart (driver rear side) and it then flowed with brake fluid nicely. The other side was not taken apart and the fluid flowed properly. I did not bleed the front brakes.
What do I do about my screwup on the emergency brakes? I’m afraid to activate them again for fear of a lock up. For now, trying to address the spongy feel is the priority. I will go out tomorrow and pull the wheels off and try again...
Any helpful hints mich appreciated, I know I screwed up and will learn from this mistake... Cheer’s
Junior Member
Joined: Feb 2023
Posts: 1
Likes: 0
From: Miami, FL
First Post... Desperate... So, I did it , screwed up the new rear brake and rotor install on the ‘17 CX5. I was not aware of the significance of the emergency brake (electric) and the need to put it into service mode BEFORE I started the disassembly. I got the driver side rotor and caliper off, removed the pads and realized I could not get the piston to seat back for the new pad install. This is when I learned on YouTube... of all the BS with the emergency brake and piston retraction procedure. Anyway, dumb *** me activated the emergency brake button and it pushed the piston out of the cylinder. Yeah, we’re doing a great job so far. I took the caliper off the car and onto the bench to get the piston back into the cylinder and seat the piston using the adjustment on the backside of the caliper.
You get the picture, a total hack job. I did get the pistons to retract manually after removing the electric motors, but I have no idea what I was doing with the adjustment of these internal mechanisms inside the piston... Anyway, I completed the new rotor and pads install, I put everything back together, bled the brakes and prayed...
Didnt work. I had no idea how to get the Electric parking brake activation switch inside the car to work normally again. Also, the brake pedal is spongy and goes almost to the floor before enough pressure is built to apply brake pressure on the rotors. I initially got the emergency brakes to activate, but then they locked up.... Somehow, I was able to play around in the cabin and get the emergency brakes to release. I left them alone after this...
So, I have a car that is totally parked until I can get the rear brakes and brakes in general as well as any codes, computer issues, etc cleared up.
My question revolves around the spongy brake pedal. If I drive the car slowly, and apply the brakes, the pedal travels almost to the floor and then there is just enough pressure to activate the brakes. Pre brake tear down, no issues whatsoever with the brake pedal, master cylinder etc. The car only has 35k miles on it. Did I not bleed the brakes enough? I watched the air come out of the one caliper that I had completely apart (driver rear side) and it then flowed with brake fluid nicely. The other side was not taken apart and the fluid flowed properly. I did not bleed the front brakes.
What do I do about my screwup on the emergency brakes? I’m afraid to activate them again for fear of a lock up. For now, trying to address the spongy feel is the priority. I will go out tomorrow and pull the wheels off and try again...
Any helpful hints mich appreciated, I know I screwed up and will learn from this mistake... Cheer’s
You get the picture, a total hack job. I did get the pistons to retract manually after removing the electric motors, but I have no idea what I was doing with the adjustment of these internal mechanisms inside the piston... Anyway, I completed the new rotor and pads install, I put everything back together, bled the brakes and prayed...
Didnt work. I had no idea how to get the Electric parking brake activation switch inside the car to work normally again. Also, the brake pedal is spongy and goes almost to the floor before enough pressure is built to apply brake pressure on the rotors. I initially got the emergency brakes to activate, but then they locked up.... Somehow, I was able to play around in the cabin and get the emergency brakes to release. I left them alone after this...
So, I have a car that is totally parked until I can get the rear brakes and brakes in general as well as any codes, computer issues, etc cleared up.
My question revolves around the spongy brake pedal. If I drive the car slowly, and apply the brakes, the pedal travels almost to the floor and then there is just enough pressure to activate the brakes. Pre brake tear down, no issues whatsoever with the brake pedal, master cylinder etc. The car only has 35k miles on it. Did I not bleed the brakes enough? I watched the air come out of the one caliper that I had completely apart (driver rear side) and it then flowed with brake fluid nicely. The other side was not taken apart and the fluid flowed properly. I did not bleed the front brakes.
What do I do about my screwup on the emergency brakes? I’m afraid to activate them again for fear of a lock up. For now, trying to address the spongy feel is the priority. I will go out tomorrow and pull the wheels off and try again...
Any helpful hints mich appreciated, I know I screwed up and will learn from this mistake... Cheer’s
We're you able to resolve? How?
Senior Member
Joined: Oct 2018
Posts: 10,334
Likes: 198
From: Northern California
You may look at when postings on threads were done. This member has not returned since 09-25-2020 05:34 PM a very long time ago.
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Junior Member
Joined: Sep 2020
Posts: 2
Likes: 0
From: Welland
I'm still here irrespective of the comment below. I just put it all back together and never use the emergency brake since... Has worked fine for three years, lol. Good luck with yours.
Senior Member
Joined: Oct 2018
Posts: 10,334
Likes: 198
From: Northern California
I did look at your response information on your profile. Visiting is a little different than participating, but I am sorry that I did not consider you may be doing that?
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