Prius V :: Knocking Noise When Brakes Pressed
Mar 23, 2012
I have Toyota Prius 2006 with about 58k miles. For the last 12-16 months I encounter the following problem: when I press brakes, I hear knocking noise. It doesn't happen every time, but when it does it only happens when I press the brakes. Once I brought my car to a Toyota dealer and waited for an hour until my car was taken for a service. Mechanic found no noise. I tried to produce this noise but my car didn't want to cooperate. I don't see any messages on a display screen. It happens with power on/off and pressed brakes. What the knock is and how to get rid of it?
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Today was the second time I have walked into the garage and heard my Prius making a weird noise. It's not the noise that comes from the front when you open the door or press the brakes....It's coming from the rear of the car. It stops when I press the start button. I made a video of the noise (nothing to see, as it was dark in the garage, but you can hear the noise.
My concern is that it's something running that will wear down my battery if I happen to not notice it is doing it sometime in the future.
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So, I'm having this weird knocking noise on front left (drivers) side. It appears when I'm accelerating and stops immediately when i press clutch.. The noise gets stronger if i accelerate fast and gets faster, faster i go. Surprisingly the noise stops when i lift my car up and starts again at my drive height. Could it be driveshaft joints? And which one more likely? Outer maybe?
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2007 GS 350. In the past 6 months i have changed my FRONT brake pads with two different pair. First was a generic pad(REMOVED), and did some research then went for Akebono(CURRENTLY) brake pads 2-months noise-free and now back to braking noise dilemma.
Issues:
-In the morning, first 3-5 pressed brakes makes loud(REALLY LOUD!) humming noise then goes away. Feels like the brakes are rusty but it continually does it everyday. I just got the car serviced so assuming all my fluids are filled.
-Randomly, on a fully stopped brake i hear a whistle noise from the front brake. NOT as loud described above.
-I noticed the noise happened the most on HOT weather, and occasionally on COLD weather.
Longo Lexus advice me to buy an OEM brake pads and should resolve this problem. I'm also thinking of just getting it done at the dealership and pay that extra cash plus warranty.
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I just bought a 2007 GS350 that had 45k miles and have noticed something strange with I believe the transmission. So far I have has 2 times when I have hit the brakes hard and had to accelerate again and either heard a clunk noise or even had the tires burp once after the clunk. Tonight I hit the brakes hard to avoid a red light and heard a clunk. I'm going to get it checked out at the dealer but I bet they will tell me they can't reproduce the problem. I have 2 other Lexus's (IS300) and have had no problems so this is a first.
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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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I purchased a 2001 Prius with 123K miles about two weeks ago. I knew the HV battery was shot when i purchased it. I decided to see if I could rebuild the HV battery on my own.
I'm very mechanical but not the brightest bulb in the room when it comes to batteries and anything electrical.
So here is where I'm at so far:
- I removed the HV battery.
- safely rested it on 2 horses (I used horses because it would give me easy access to the bottom to remove the bottom screws)
- Removed all 38 modules from the battery pack
- cleaned the busses in vinegar
- inspected each wire that connects between buss and the nut.
- tested each battery ( one of the batteries tested at -0.1, the others tested at 6.8)
- I don't know how to load test the modules, so I couldn't tell if they would drop dramatically under load, so I ordered 38 used replacement batteries off of Ebay. (Gen II)
- these replacement modules were about a half inch longer than my original modules.
- The replacement modules arrived. I cleaned the terminals, tested each one and installed them.
- Connected the battery back into the prius.
- Installed new 12V battery from the Toyota dealer.
- The Prius started right up.
- Drove it around for the first time for about 10 minutes.
- When i was driving it, the monitor in the Prius would show the engine running most of the time but sometimes it would show it charging the HV and other times charging the 12V. the engine would shut off at stop lights and resume when I pressed on the gas pedal.
- while driving back into my driveway, all of the warning lights came on and the battery fan kicked into high gear,
- I can't remember the code I pulled but it was in reference to the cells being out of balance I think. I'll have to check it again tonight when I get home.
- I removed the HV and tightened the nuts around the busses hoping the issue would be resolved.
- I was able to drive it only a few minutes before the issue returned.
other issues I noticed.
While waiting for the replacement batteries to arrive, I did the following:
- changed the cabin filter
- did an oil change.
- changed the tranny fluid and removed the tranny pan to clean out the slime and clean off the magnet.)
- changed the rear brake shoes.
- changed the front brake rotors and pads. ( they were in awful condition due to sitting so long)
***when I pressed on the brakes, only the rear brakes seem to engage, not the front. I never attempted to bleed them because I know only the dealer can do that)
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My 2010 with 110k is now making a single yet audible "click" sound when I accelerate off of the line. It makes the same exact sound each time I press the brake pedal at speed. Just one click, not a continuous clicking. What's wrong??
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Is it normal for the Prius's brakes to make a low-pitched squeak (kind of like something wet rubbing against something, or a burp), when I press it semi-deeply and release? The only reason I'm worrying is that I ran over a camouflaged flat metal object on the road today while changing lanes, and it could've weighed anywhere from a soda can to a heavy shovel -- it clunked against the bottom of my car loudly, then got propelled into the air and barely missed a car behind me. It seems trivial but I'm paranoid because I just got the car (used, great condition) and that happened on my first day. I don't remember if it was squeaking before the shovel incident. My girlfriend says her 3rd gen prius does it too but I have yet to verify it.
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It happens quite often, when i start the car, and apply brakes, then there is some sort of knocking sound coming from the rear. It sounds like someone knocking on the door... But the sound will disappear after a while. The car drives fine, could it be the brakes?
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I have a 2003 Toyota Echo. About 6 months ago it starting making a knocking noise when I applied the brakes. I thought it was my differential (it isn't) because it is a used transmission. That's not it. My mechanics were stumped, of course it never seems to make the noise when they have my car. They also checked the rotors, and I maintain my brakes.They replaced a wheel bearing on the left front wheel, the noise stopped for two weeks then started up again. Only when I use the brakes do I hear it, and I hear it more often than not.
There also seems to be a bit of a creaking noise with it. It does it more in stop and go traffic, and the car usually has to be a little warm before it gets noisy. They ended up replacing a rear drum thinking the noise transferred to the front, didn't work. What could this be? it's pretty loud and disconcerting when I'm driving. It only happens when I use the brake (more so slower speeds) so what is left besides the wheel and the brakes? My mechanic said the noise stopped when they replaced the wheel bearing because they took the wheels off, and that somehow fixed it temporarily.
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2006, 112k mi. there's been a whine-like noise that only happens when the accelerator is pressed ( and mostly noticed at highway speeds) and stops immediately when accelerator is released..
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I was wondering if this problem is the "Barking" noise that keeps coming up the search or is it another problem. I will include a link to the video down below.
To start off, the Prius is 2010 Prius II and has 120k miles on it. Great Car. Only other problem was AC compressor dying at 90k.
The chirping noise happens when the brake pedal is pressed and does not go away until the release the pedal. It makes the noise regardless of whether the car is on or off.
It makes the noise when the car is stopped and or when the mechanical brake engage at between 0 and 6 mph.
Noise does not occur when the brake switch is removed. Not valid solution since the brake lights will stay on. It does not affect the performance of braking.
Here is the link to the video .... .... ....
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I'm hearing a squeking noise when I go over bumps and when I i press the brakes. sounds like it could be my springs or some such related thing.. Could it be a different front end issue?
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I recently crossed 21 K miles in my Saturn. The brakes make a squeaky sound every time I press them. Is this a sign that the brakes need to be replaced?
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This morning my brakes seized up on me on the freeway. I noticed it when I pressed the brake pedal and I it would barely go down. Then, I could smell the brakes. I pulled over and there was a strong smell from the brakes and I couldn't press the brake peddle down any. I waited a while and let the brakes cool off and then they were fine. I got the rear brakes replaced at the dealership earlier this year.
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What can I do to fix this? 1987 Supra. No brake lights go on when I press on the brake, including the middle light. Tail lights do work, but no brake lights. It has been somewhat intermittent as well...
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1999 Explorer XLT V6 SOHC.. I noticed today that my brakes drop nearly to the floor when I press on them. The car just passed inspection so I doubt that they brakes are worn. Master Cylinder has the correct level of fluid and the pedal is hard when the vehicle is off, so I doubt that the master cylinder is failing. How would I go about troubleshooting this problem?
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We have a 2002 Malibu with 216,000 miles. Car in excellent condition and always garage kept. We have used the same mechanic for many years until this year when he closed his shop. We do plan to replace the car next year, but it's just not necessary to do so just yet.
A couple of month ago someone rear ended me and the body shop replaced the trunk weather stripping, rear bumper, light assemblies, repainted the trunk/bumper/rear side panels.
Several weeks ago, while hubby was pulling the car out of the garage I noticed every time the brake is pressed the backup lights come on too. I then checked turn signals, all other lights, etc. Everything else appears normal except this oddity.
I took it back to the body shop and told them what was happening and said it had to be something done during the repair work. He checked and said everything was hooked up correctly and I needed to take it to a mechanic because it wasn't anything they did.
I have researched and researched and found several other people with this problem. One answer was that the new light assembly was after market and the "pins" were not compatible with the original wiring harness. Another was that the wiring harness coming from the trunk was somehow damaged.
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In the video below driver presses the brake and taillights begin to blink rapidly. Modified with Vag-com or something else ? [URL] .....
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My 2012 camry recently had an issue with the acceleration that I took to the dealer and they drain and filled the transmission fluid 3 times and it fixed that.
There is still one issue which I'm not sure is normal or not - when I let the car coast by letting off the gas the car feels like the brakes are being pressed and it decelerates faster than normal. Also, my e-brake seems less tight than before so it doesn't really stop the car from going back when I park it unless I push it really hard.
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