Parking brake malfunction

yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
:
Plano, Texas, USA
I own a 2016 CX-5 sport model that is a manual 6 speed, so I use the parking brake every single time I park, and of course when on an incline, I put it in gear. Anyhow, back in late November, I took mine to a local mechanic to replace the rear brakes at around 46k miles. Now less than 2 months later, the EPB has failed. I had two incidents in the same day where when I started the car, the brake wouldn't release and the warning lights were blinking. I had to restart the car multple times before it would disengage. After the second incident, I drove straight over to the Mazda dealership and as it was the end of the day, I had to wait and take a loaner. Anyhow, the next day, after having to call in their field tech/engineer because the in-house tech couldn't diagnose the problem, they reported that the calipers were damaged and blamed it on the mechanic who replaced the brake pads, saying he failed to put it into service mode. I contacted the mechanic who did the brake job, and he said it is not possible to replace the pads without putting it into service mode. However, what I don't know is if he correctly followed the warning not to turn the piston thing, which needs some special tools to remove. The Mazda service rep insists that the calipers got damaged and stripped during the brake service and allegedly this type of issue with the brake seizing doesn't present itself right away, which I find hard to believe.
So now I'm stuck with having to pay over $1000 for a repair. I am pissed! I am still arguing with the service rep and am about to demand to speak to their manager.
To be fair, Mazda field engineer does have his point on your case. You can try to escalate the case to higher authorities but it’s very likely the brake shop did something wrong and of course they won’t admit it. The best chance of your argument right now is to use the TSB, and insist you have the dragging issue and that’s why you need early replacement on rear disk pads.
 
For the past few weeks 3 out of 5 times when I start the CX-5, I see the following:

1. Red flashing "BRAKE" light near the dials
2. Orange steady "P" light near the dials
3. Flashing "P" light on the electronic parking brake
4. Two warnings in the infotainment reading "Parking brake malfunction. A malfunction has occurred in the parking brake system. Consult your Mazda dealer for inspection".

Whenever this happens, the brake is not engaged and I can drive like normal. Took it to the dealership yesterday but accidentally turned off the car before I stepped out. When I turned it on, the warnings did not appear. It reappeared last evening and this morning.

I read here this could be because of freezing temperatures. I live in South Texas and it was well over 70 F today and I still had the warnings.

It happens when engine is warm and cold. Any idea what could be causing this?

See links below :
Literally having the same exact problem. Everything runs like normal, until someone accidentally hits the e brake switch. Then I'm stuck, turning the car on and off, trying to get the e brake to release the passenger side rear wheel.
 

yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
:
Plano, Texas, USA
Literally having the same exact problem. Everything runs like normal, until someone accidentally hits the e brake switch. Then I'm stuck, turning the car on and off, trying to get the e brake to release the passenger side rear wheel.
Again, most likely you need revised rear calipers which got stuck. See post #10 and TSB R052/16C.
 
:
Southwest Ohio
:
'19 CX-5 diesel
@Skmulla96, Firstly, If your not confident in your abilities to troubleshoot this brake problem, get a professional to look at it .... brakes are pretty important ;).

Beyond that, I recall a poster stating he solved the immediate problem of the brake sticking by entering and exiting EPB "maintenance mode". He was at least able to get moving again. Idunno if the problem came back or not.

As for the TSB -- brake caliper issue thing. My 16.5 falls within the VIN range and the date code on the caliper is a "bad" date but I've (knock on wood lol) not had any issues with mine. Just changed the rear pads recently (95k miles) and they've worn evenly and probably could've made it to 125k miles. Go figure.

Good luck to you
 
:
Pueblo county CO
:
CX-5 Sport 16.5 6M
As for the TSB -- brake caliper issue thing. My 16.5 falls within the VIN range and the date code on the caliper is a "bad" date but I've (knock on wood lol) not had any issues with mine. Just changed the rear pads recently (95k miles) and they've worn evenly and probably could've made it to 125k miles. Go figure.

Good luck to you
I have a 16.5. MT and the left rear stuck four times a couple of years ago.

I cleaned out the old caliper pin grease and packed it with fresh lube. So far no problem.

I am a bit concerned the problem may eventually recur so I try to verify that the wheels are not locked whenever I release the EPB.
 
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