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Toyota Prius Brake Problems

82 messages,  Last post on Nov 29, 2009 at 11:57 AM

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What is this discussion about? Toyota Prius, Brakes, Hatchback, Sedan


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#51 of 82
Re: Prius Brakes issue [brendabei] by whitey9
Apr 17, 2009 (6:18 am)
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Replying to: brendabei (Apr 17, 2009 5:58 am)

That's the point. No one THINKS they are "accelling", but with all of today's distractions we encounter while driving ( radio, TV/NAV, phone, makeup, kids/babies in back seat, changing pants, etc. ) sometimes we make mistakes.
As I said earlier, the proof of that lies in the Audi history with people SWEARING the car "accelled" by itself. But actually not.
That is why we now have "shift locks" on all our cars. We must now press the brake to shift out of Park.
I will check the NHTSA website to see about any reports of this malfunction.
#52 of 82
Re: Prius Brakes issue [smt1] by hadjib
Apr 17, 2009 (11:53 am)
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Replying to: smt1 (May 11, 2006 2:05 am)

I know this message was posted a while back but was anyone able to get it resolved?
I am seeing the exact same brake noise while coming to a stop: noise like metal parts are rubbing against each other. I can even feel a little bit of feedback on my foot while this happens.
 
I realized that this doesn't happen under wet conditions (if there had been snow/ rain) or after the car has been driven for a while. That was probably why it never happened whenever I took it to the dealer to get it checked.
 
If anyone did get it resolved by yourself/ outside mechanic/ a dealer, can you please reply?
 
Also, I have the some other issues as well:
1) sometimes the car speeding up when the brake is being applied.
2) a whistling noise inside the car when driving above 35mph (like there is a hole somewhere thro which air is leaking in)
3) the handrests and some other interior plastic is loose resulting in rattling sound when driving over rough roads/ playing bass-y music.
 
I am going to take the car to the dealer soon but if anyone has seen similar issues and have resolved it or know how to fix them, please reply..
 
Thanks in advance
#53 of 82
2008 brakes by whardy
May 18, 2009 (5:50 pm)
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I have a 2008 prius with 20K miles. Just drove from Sacramento to Tahoe and heard a funny noise on right side rear of car. Thought it sounded like an aerosol can releasing in my suitcase in the back of car, but maybe not, because we parked the car for one day, then drove it around town for one day (but there was a funny smell in the car when we got in) but had no problems, then today every time we press the brake pedal there is a funny noise. I'm concerned about driving the car home to Sac now after reading about other posts about brake problems. Anybody know what's going on?
#54 of 82
Re: 2008 brakes [whardy] by whitey9
May 18, 2009 (7:54 pm)
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Replying to: whardy (May 18, 2009 5:50 pm)

Knowing that the two most important systems of a car are the braking system, and the steering system, I would sure as heck get any kind of a problem checked out before driving home thru the mountains.
It is about 115mi back to Sacramento.
Make sure the brakes work!
 
Get them checked at the dealer in South Lake Tahoe! Arrive alive.
#55 of 82
Re: 2008 brakes [whitey9] by whardy
May 19, 2009 (2:05 pm)
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Replying to: whitey9 (May 18, 2009 7:54 pm)

Thanks for the reply. I called the dealer last night and they called me back this morning. Nice guy said to bring the car in to check it out. I'm a little concerned about driving it all the way over there especially when I looked at the construction delays. Looks like it would take quite a bit longer and probably more stop and go traffic using the brakes even more. Not sure what to do.
#56 of 82
Re: 2008 brakes [whitey9] by whardy
May 19, 2009 (2:19 pm)
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Replying to: whitey9 (May 18, 2009 7:54 pm)

Talked to the guy at the dealership. Will go to Tahoe City and down 89 instead tomorrow morning to have it checked out.
#57 of 82
Re: 2004-2009 Prius Brake Failure Rate is High [ganderc] by hal_cat
Jun 08, 2009 (7:48 am)
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Replying to: ganderc (Apr 07, 2009 10:42 am)

You can bump the number of complaints up by one. I've finally submitted mine for my 2007 Prius with 37,020 miles.
 
Like others, I was traveling at a low speed, about 15mph. I had to do a quick stop because of a car stopped in my lane. There were parked cars on one side and opposing traffic on the other so I had no avoidance options. When I jammed on the brake, absolutely nothing happened before I hit the Imperial in front of me. The time from hitting the brakes and hitting the car was long enough for my wife to realize that we weren't stopping, shout "stop the car" and for me to reply "I'm trying to, but nothing is happening."
 
The dealership checked the car, and of course nothing mechanical was at fault. Toyota sent a regional rep to investigate, and a couple of days ago we got a letter from Toyota legal saying that obviously I did not step on the brakes until it was too late. Now we are getting the car repaired (we have insurance, and the cost is estimated at $4000 to $5000), but we are unsure what we will do with it when we are done. We don't like the idea of driving it - the though of cruising slowly into an intersection of fast moving cars doesn't appeal to us, nor the though of driving down a mountain without guard rails which we have done in other cars. If we sold it to someone ourselves and something happened we would feel like we had blood on our hands. Our best option is probably to sell it to a Toyota dealer so at least they would have the responsibility for future lawsuits.
 
What I would really like is for Toyota to fix the brake problem for my car. I really enjoyed it for the first two years. I don't expect to see a fix though, the recall would be too expensive for them, and stonewalling will probably see them through.
#58 of 82
Re: 2004-2009 Prius Brake Failure Rate is High [hal_cat] by jpeters1970
Jun 26, 2009 (6:23 pm)
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Replying to: hal_cat (Jun 08, 2009 7:48 am)

A lot of people don't realize that the Prius brakes differently than other cars. When you initially press the brake moderately and you're going 45MPH, the Disc/Drums are NOT engaging, but what is happening is that the generator is applied and converting energy for the battery, Yes the car is slowing down, but without the aid of the conventional braking system. If you slow down faster i.e. press harder, you will eventually engage the disc/drum brakes which will augment the braking power of the vehicle. I have 66,000 trouble free miles in my 2004 Prius and I've driven in snow, rain, dry weather and heavy stop and go city driving. I have never,ever had any incident with respect to the brakes not doing what they're supposed to. I did have one instance which scared the crap out of me and that was unintended acceleration. I had the car cleaned the day before and they put the mats back incorrectly. I took my foot off the accelerator and the car kept going faster!!! I immediately knew what the problem was, pulled over and remounted the mat on the holding pins. Based on the submissions to the NTSB site and also based on other sources (CR, Prius enthusiast sites) there is nothing wrong with the braking system of the Prius.
#59 of 82
Re: 2004-2009 Prius Brake Failure Rate is High [jpeters1970] by jacquesc
Jun 27, 2009 (1:58 pm)
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Replying to: jpeters1970 (Jun 26, 2009 6:23 pm)

There is something wrong with the break system. Occasionally a delay occurs between abrupt low speed brake pedal application and brake engagement. It hasn't happened to you - but it exists. And it is a design flaw. And has cost Prius owners thousands in deductibles and raised insurance rates.
#60 of 82
Re: 2004-2009 Prius Brake Failure Rate is High [jpeters1970] by hal_cat
Jun 27, 2009 (7:44 pm)
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Replying to: jpeters1970 (Jun 26, 2009 6:23 pm)

You are fortunate, as are almost a million other Prius drivers, who have never encountered the brake problem. I had driven 32K miles with no brake problems what-so-ever. I believe that the problem has to do with the interactions of the energy management software, the brake system software, and the brake hardware. I believe that the problem is the result of some very specific set of conditions which do not happen very often, given that hundreds of thousands of Priuses with the same equipment and software that I have are not crashing daily, or even monthly. I have 14 years experience in writing software for engines and transmissions. I understand how difficult it is to develop a fail-safe system, and how a very simple detail, like comparing two values incorrectly, can make the difference between something working correctly all the time or working correctly almost all the time, and with brakes, almost all the time is not good enough. I also believe that if it were happening all the time, the software and hardware engineers in Japan would have found the problem and corrected it. I do know that I slammed down the brakes hard when I wanted to stop, and that I got absolutely no observable response at all. (I don't know if it was charging my battery prior to slamming me into the car in front of me.) I sincerely hope that you don't have a brake failure like I had, but I know I won't, because I am dumping a two year old Prius which my wife refuses to ride in.

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