Prius (Gen 2) :: Rear Brakes Grabbing Hard
Jan 10, 2013
Two weeks ago I took my 2004 Prius (with about 165,000 miles on it) to the dealership because of problems with the rear (drum) brakes grabbing (sometimes hard enough to lockup one of the wheels). Their diagnosis was that they were badly out of adjustment. They "cleaned, adjusted and beveled rear brakes" which fixed the problem, but it returned this morning. I should also mention this dealership had "cleaned and adjusted" the rear brakes twice before over the last couple of years.
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About a year ago, the rear brakes became very suspectable to moisture and started grabbing. After a few stops the grabbing would subside, but I could still feel the rear brakes engaging a little earlier or more than the front brakes (the rear-end of the car would hunker down a little). So I replaced the rear shoes, the old ones had about 90K on them, not worn real bad and had plenty of life left. I made sure that when I installed them to clean everything, put a skim of silicone brake grease on a couple of the friction points and set the adjusters down so they would be able to auto adjust to the right setting.
The grabbing didn't stop, so I've lived with it for a while and finally got around to replacing the front brakes on the assumption that maybe since they were old that they may not be stopping the car as much as the new rear brakes were. Didn't work, in the back of my mind I'm wondering if there is possibly something wrong with the master cylinder and the balance between front and rear brakes is off. I'm going to go clean the rear brakes again today and crank the adjusters back to see if they adjust to a better position this time around. The drum and disc surfaces are in good shape and color.
Can the master cylinder get its balance messed up?
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I have a 2007 Prius with 130,000 miles on it. I plan to trade in about a year, maybe a little less. I have noticed my brakes grabbing. My mechanic says that the front brakes are sort of grinding and the rear brakes are grabbing. Both are worn, the rear brakes to about 30%, front brakes to 60%. They also say they will probably last out the year. Should I put new brakes on to be safe and to be able to sell the car with new brakes, or should I just wait it out and trade it in with worn brakes?
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What causes grabing brakes in the morning OR when wet???
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I have an 2007 Toyota Prius and in the mornings, especially if it is humid or moist outside, my brakes grab badly during the first couple of stops....it's bad enough to make somebody run into the back of me. When it happens, you will also hear a screeching noise coming from the (sounds like ) rear brake, passenger side. I have taken the car to the local garage twice and they found nothing wrong. I have taken it to the local Toyota dealer 3 times and likewise, they found nothing wrong either.
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What would cause the rear drum brakes to lock up upon hard braking? I have replaced the wheel cylinders, installed new spring kit, and adjusters.
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So I have a 2012 Sonata with about 80k miles on it. I bought it used a few months ago. It has recently started having issues with the brakes.
When the car is cold and I start driving, every time I push down on the brakes they will do a quick grab after a few seconds. Sometimes its a slight grab and other times its a jerking grab. After I drive 10-20 miles or so and it warms up this goes away.
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I have a 1990 4x4 ford Ranger, the little truck was purchased in early 2008 as a work truck but has ended up becoming my main vehicle, it has been a good truck for the most part but know I am having some brake issues, well have been having for some time but they seem to come and go. Usually it happens when I have to hit the brakes hard, the rear brakes lock up, I replaced the master cylinder months ago and thought that fixed it, then a month later it happened again. The last time it happened was friday, the time before that was in march 09'.
I have searched this online and found numerous try this but the original poster never comes back to say if the problem is fixed or what fixed it. My ABS light DOES NOT come on when this happens, it does function properly, it illuminates when the key is turned on then goes off. My parking brake no longer works either but I think that is from me "driving thru" the locked up rear brakes. I plan on replacign both drums and shoes within the next week but would like an option to repair the locking up issue.
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My car got into an accident and the driver side door needed to be replaced. My wife picked the car up from the shop, but i guess she did not think anything wrong with the car. My problem is as follows:
When I go to grab the handles of my car (driver, passenger, trunk) with my key fob in close proximity (pocket), instead of the double beep signalling an unlock of the doors, there are multiple beeps (maybe 5 sets of double beeps) along with the emergency flashers flashing.
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This morning, I hit the brakes medium hard and got a short metal-on-metal 'scrape' noise from the rear end. It sounded like a brake shoe to me. Later my wife was out shopping and did a 'regular' stop and got the same noise.
The car isn't driven a lot. It's just under 1.5 years old and has 5,400 miles on it. So, I'm pretty sure there isn't a lot of brake wear. Maybe a little above average from mostly city driving. I assume the rear brakes are self-adjusting. Do they make noise when they are adjusting?
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This morning when trying to leave for work, my prius refused to turn on. When you press the brake so you can press the start button, the brake feels extremely hard, almost like it doesn't want you to press it. The light on the start button becomes orange after a pressing the button once. And on the dashboard screen (I don't know what call it on a Prius) in the very bottom right corner, a red notifications light flashes very quickly, so quickly that is hard to tell what it is, but by staring at it for like 30 seconds it looks like the symbol of a car with a lock attached to it. I may be wrong though. My Prius v is a 2012 model, trim three, and it has a little over 60,000 miles on it. I also have a prepaid maintenance through the dealership. I don't even know where to start.
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There is a pretty loud continuous clicking noise lasting about 30 seconds (not necessarily a bad one - just annoying) that comes on every thirty seconds to a minute when I'm driving my Prius. It happens more often now than it did 10,000 miles ago.
It also happens without fail for a few seconds every time I brake. Is this a normal noise? I fear it may be associated with the brake actuator--which the chirping noise is associated with.
If I press firmly on the brakes (which is rare), they chirp. Toyota released a bulletin on it. TSB BR001-07
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Occasionally for the last year when in Reverse my Prius' brakes will feel hard as rock and will only depress an inch or so. I depress the brake and within a literal inch it's solid and will not depress any more. I can still use the brake and reverse it's just jerky and awkward because I only have an inch to work with.. it's like they lock up or something.
Well today same thing happened while in reverse but instead of the car actually reversing like normal when it has this hard brake problem it actually started rolling forwards while in reverse!! it was as if it was in neutral because touching the acceleration pedal did nothing.. which made me think of neutral cause it does the same thing, but the dash read reverse... all while I'm dealing with a hard brake. I have come to overlook it because I cannot mimic it and figured it was a possible regenerative/electric braking thing and seems fairly common among people here, but today was spooky because it rolled forward out of the blue..
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I've noticed that when I'm stopped, or in park, and I push on the brake pedal hard I hear a squeak or chirp that sounds like it's coming from the wheels. It might even sound like someone is honking at you as if you were not going when the light turned green. I have not been outside the car when this occurs, so I don't know exactly where the sound is coming from.
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Every single time it rains, our 2005 Prius' brakes tend to go haywire-and just when we need them the most. They back breaks lock up, bringing the car to a jolt and throwing us forward. Sometimes it feels like it won't brake and then bam, a very hard stop. Sometimes they squeak and grind too- It never happens when it is sunny outside-only where there is a significant amount of moisture in the air. We've taken the car to the dealer three times and they can never find anything wrong with it.
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I have a 1997 F150, 4X4. My mechanic says its time for new brakes and was curious if it would be worth possibly converting from drum brakes to disc brakes??
My mechanic has quoted me $300 to do the rear brakes, would it be worth the extra money to convert??? I really don't care for drum brakes. I have done a search on the internet and every time it brings up the issue with the parking brake.
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I have this truck (in signature below) that I have not driven for ~3 years. As I am starting to drive it I am noticing I need to put A LOT of pressure on my brake pedal to get the brakes to work. They stop the truck and the pedal doesn't feel soft as if there is air in the line but it feels as if I apply a lot of pressure and there isn't a lot of grab.
While it might be possible, I don't think I have any type of glaze or coating on my brakes that would cause this. 95% of those 3 years, the truck was inside.
I wonder if it feels as if the truck is hard to stop because of the additional power I have coming from this new motor?
Is there any type of part I can replace in the brake booster to adjust the pedal? Or brake booster. Maybe that is going bad?
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I have a 97 F250 that is having reoccurring brake issues, It has an intermittent hard pedal with little to no brakes when it occurs. It will stop but you are standing on the pedal with both feet. I have replaced the booster, master cylinder, and the vacuum pump in the past trying to isolate the issue and still had the problem. On this year model the abs ids only on the rear correct???? if it is shouldn't it only be affecting the rear brakes? Since this truck has a dual reservoir MC the front should still work?
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So, my 2012 Prius has 61,000 miles and I started hearing some terrible squealing from my rear brakes. This weekend, I decided to take the tires off and investigate. Turns out, that my rear pads were worn to metal.
I switched the pads with new ones. The rotor was still new and didn't need replacing. Torqued the caliper bolt to 25ft/lb and put it back together. However at the end, I forgot to put back on the two wire clips take keep the brake pads apart!
Do I need to put these clips on? I'm too lazy to take my tires off again.
Lesson learned: Turn clockwise and PUSH the rear piston at the same time to get it to go back in. Turning it alone does nothing.
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I brought my prius v back to the dealer for the fourth time because of the groaning noise from the rear brakes. I was told that Toyota is aware of the problem and they are designing a new rear brake. They expect it to be ready for installation after January 1st, 2013. Let's hope it isn't too far after the first of the year.
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The uneven wear occurred again, this time only giving me 22,644 miles on the rear brakes. So, I am on my third set of rear brakes at 78,000 miles.
This time the dealer contacted the district rep since this was a repeat occurrence. It turns out a week after my first rear brake job, Toyota issued T-SB-0248-12, for this very problem, on the 2010 - 2012 Prius and on the 2012 Prius PHV. There is a new brake pad that is supposed to address this problem. The old part number that was put on my car during the first brake job was 04466-76011 and the new part number is 04466-47080. The receipt also shows Brake Shim Grease part number 08887-80409, which is noted in the TSB.
Toyota did the right thing in that they covered the cost of the brake job I just had done. I just opened a case asking to be reimbursed for the first brake job since this turned out to be a problem that was addressed with a new part.
I suggest anyone with a 2010-2012 Prius or 2012 Prius PHV that needs rear brakes, make sure you insist on getting this updated pad and point out this TSB. My service adviser said they were going to replace all of their pads with the old part number with the updated pad, so other customers going forward receive this new pad, though he also said they just don't do a lot of Prius brake jobs.
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