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Old 11-04-2017, 09:21 AM #1
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5th Gen Brake Failure - 17 TRDP

Have a 17 TRDP and yes experienced a complete brake failure. No alarms, No warning lights.....just a pop from the brake unit and the pedal went to the floor. Fortunately able to stop by pumping the brakes giving me some pedal, using the emergency brake and downshifting transmission. Very Lucky as rolled into center of 4 way stop until I stopped!

Anybody have information or experience on this? As mentioned, was able to pump pedal to get some braking. Would then hold it and it would fade back to floor.

Vehicle is at dealer now. Of course they say all is well.....but they did mention they downloaded codes consistent with a braking event? I told them it was a complete Master Cylinder failure.......anyhow, also told them to find the issue and fix it as I would not get back into the car until they repaired it
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Old 11-04-2017, 09:29 AM #2
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Quote:
Originally Posted by Hadelson View Post
Have a 17 TRDP and yes experienced a complete brake failure. No alarms, No warning lights.....just a pop from the brake unit and the pedal went to the floor. Fortunately able to stop by pumping the brakes giving me some pedal, using the emergency brake and downshifting transmission. Very Lucky as rolled into center of 4 way stop until I stopped!

Anybody have information or experience on this? As mentioned, was able to pump pedal to get some braking. Would then hold it and it would fade back to floor.

Vehicle is at dealer now. Of course they say all is well.....but they did mention they downloaded codes consistent with a braking event? I told them it was a complete Master Cylinder failure.......anyhow, also told them to find the issue and fix it as I would not get back into the car until they repaired it


This just happened to someone else. Be prepared for a bunch of people to start calling you a liar


Might be an ABS issue. Good luck
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Old 11-04-2017, 11:15 AM #3
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Geesuz that’s scary

Just like the old accelerator/floor mat recall, people were calling bs, come to find out, yep it was a problem. Having no brakes is way more dangerous.
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Old 11-05-2017, 09:38 PM #4
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Do us all a favor and post back what the results are. There are a lot of people who start threads, get advice and then we never hear from them again with the results.
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Old 11-05-2017, 10:17 PM #5
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Do us all a favor and post back what the results are. There are a lot of people who start threads, get advice and then we never hear from them again with the results.
Good point and agree. Right now, TRDP is at the dealer waiting to here from area rep and Toyota in California. Of course, now brakes check out-but they are saying they downloaded codes consistent with Brake issue.
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Old 11-05-2017, 10:20 PM #6
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Anybody have information or experience on this? As mentioned, was able to pump pedal to get some braking. Would then hold it and it would fade back to floor.
This happened to me too on a 2015. Took it to the dealer for a full system checkup and got the usual "can't duplicate the problem" bullshit.

File a complaint ASAP with NHTSA: https://www-odi.nhtsa.dot.gov/VehicleComplaint/
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Old 11-06-2017, 12:19 AM #7
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Looks like at least 4 people here have had that happen


This time the brakes didn't work!
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Old 11-06-2017, 12:53 AM #8
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I read some Lexus Gx models had this problem intermittently. Curious to see what they find. When I had a problematic Jeep I had to take cellphone video to prove my point. First couple of times Jeep dealer could not replicate my problem. When I started taking video they had to actually work on the vehicle. Video with your foot on the floor should get their attention. Even if the vehicle is stopped.

I Lemon Law'd the Jeep. Bought the 4runner.

I uploaded the video to YouTube. Kept it private. Sent the link to the service advisor. I wanted the problem fixed. Was not my intention to embaras the dealership or manufacturer.
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Old 11-06-2017, 01:31 AM #9
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I had a similar problem with my new Harley. First thing in the morning I would squeeze the front brake lever all the way to the grip, and no brake. After pumping it a few times it was good for the rest of the day. I was told by an independent mechanic that it was a known problem, and after the front caliper was replaced under warranty it never happened again.
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Old 11-06-2017, 11:02 AM #10
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I think the big issue with no one believing anyone when this occurs is simply because it isn't possible to happen without a large amount of evidence. There would be a huge leak of brake fluid which would be everywhere or there would be extremely low brake fluid. Otherwise there is nothing that would cause the brakes to simply not work and then work fine.
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Old 11-06-2017, 12:13 PM #11
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Quote:
Originally Posted by enapa View Post
I think the big issue with no one believing anyone when this occurs is simply because it isn't possible to happen without a large amount of evidence. There would be a huge leak of brake fluid which would be everywhere or there would be extremely low brake fluid. Otherwise there is nothing that would cause the brakes to simply not work and then work fine.

That’s just not true. I have been working with hydraulics for decades and have seen plenty of instances where fluid is able to pass through valves due to internal failure with not so much as a drop of fluid leaving the system.

You don’t have to “lose” fluid to lose the ability to create pressure. A simple o-ring failure can do it. Expansion, solenoid failure, etc will all cause a system to malfunction.

We’ve all seen instances where someone lost an entire pad or the pad ate through the rotor because people don’t even understand or think things need servicing. This will cause a pedal to go to the floor till the proportioning valve reacts and then the pedal will pump up and work. It happens.

Last edited by Argyle Edison; 11-15-2017 at 09:06 AM. Reason: I can’t spell
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Old 11-06-2017, 01:53 PM #12
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Originally Posted by enapa View Post
I think the big issue with no one believing anyone when this occurs is simply because it isn't possible to happen without a large amount of evidence. There would be a huge leak of brake fluid which would be everywhere or there would be extremely low brake fluid. Otherwise there is nothing that would cause the brakes to simply not work and then work fine.
Two things for sure at this point.

1. Complete brake failure

2. No leaks anywhere
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Old 11-06-2017, 02:30 PM #13
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That’s just not true. I have been working with hydrologics for decades and have seen plenty of instances where fluid is able to pass through valves due to internal failure with not so much as a drop of fluid leaving the system.

You don’t have to “lose” fluid to lose the ability to create pressure. A simple o-ring failure can do it. Expansion, solenoid failure, etc will all cause a system to malfunction.

We’ve all seen instances where someone lost an entire pad or the pad ate through the rotor because people don’t even understand or think things need servicing. This will cause a pedal to go to the floor till the proportioning valve reacts and then the pedal will pump up and work. It happens.
See but you are ignoring part of my post. If it fails one time, it isn't going to work just fine after that with no signs of why it didn't work that one single time. Obviously it can fail internally, but if it fails it fails. And obviously if a pad fell out that would be pretty clear.
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Old 11-06-2017, 02:31 PM #14
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What did the dealership say?
I am curious to hear what they say
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Old 11-06-2017, 02:54 PM #15
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See but you are ignoring part of my post. If it fails one time, it isn't going to work just fine after that with no signs of why it didn't work that one single time. Obviously it can fail internally, but if it fails it fails. And obviously if a pad fell out that would be pretty clear.
I think you are talking about a critical failure, meaning a broken part. Any wired connection shorting can easily cause intermittent failures without hardware failure or leaks.
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