Prius (Gen 3) :: Clunking Or Knocking Sound Under The Hood When Braking
Sep 6, 2012
I am noticing a sort of clunk or knocking noise from under the hood when I hit the brakes. I thought it might be the pads, but it comes from under the hood .It only makes the sound on the first touch of the brake, once you have your foot on the pedal it stops the noise. It does this every time on the first application of the pedal. Is this sound normal? I don't recall hearing it when I test drove the car, maybe it's been there all along and I am just now making note of it.
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I told them that my car sometimes when I accelerate a knocking or rattling sound comes from underneath the hood. I asked them to check it. I told him it sounded exactly like an older car I had many years ago which was the result of bad gas or too low octane.
With my older car I added higher octane gas (89) and the sound went away. I had a 2011 Prius before and never had this problem and I get gas at the same gas station for years.
So the mechanic test drove my car and said they couldn't find anything wrong with it. So I'm stuck with the annoying rattling/knocking noise when I accelerate (which happens about half the time), but now I'm experiencing another problem.
A couple days later I drove to get dinner. One way it is about 7 miles. Almost the whole way the ICE would not turn off. I would be at stop light, wouldn't turn off. I pulse and glided, when I glided the ICE remained on. Take my foot off the gas at slow speeds, ICE still on.
Finally towards the last 1 or 2 miles it started going into EV when i let the foot off the gas. On the way back it ran normal. It's been close to a week now since I brought it in for service and I only had trouble one other time.
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My 2000 Jetta GLS is producing a clunking/knocking sound from the front end (possibly left-front) ONLY while coasting and going straight. It mostly goes away if I turn left or right and totally goes away when I give the wheels engine power or when I brake.
I recently replaced my front-left control arm due to a thrashed rear bushing. I didn't replace the bearing as I didn't have a pickle fork. Not sure if this is related.
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I replaced the drivers side CV axle due to the fact my wife and I both heard the famous clicking sound when turning left, I inspected the CV axle and it looked to be in good shape, no tears or rips but I replaced it anyways and now I am hearing and feeling a knocking sound (seems to be coming from the inner shaft, but not positive) when I am driving. It is also vibrating the steering wheel.
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My Phaeton has recently developed a single clunking sound that occurs at low speed, either when braking, or when turning the steering wheel towards the right about 90. The clunk can be felt at the drivers footwell area too.
All four upper control arm bushings were replaced a few months ago and the antiroll bar links are pretty new too.
I have not identified exactly where the noise is coming from, but by placing my hand on all suspension components it seems that the clunk is most felt at the front left rear lower arm. Hence I am wondering if the bushing or the whole arm may need replacement.
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I have been getting a clunking sound coming from the rear of the car while braking. it was louder and more frequent before a few things were done by the dealership in an attempt to fix it, however i still have the noise fairly often during normal driving. This is three months into the issue and i still don't have a solution from the dealer or VW. Things that have been done so far by dealership:
1. replaced left and right side rear caliper brackets
2. replaced rear brake pads
3. surfaced rear rotors
All of the above were recommended by vw, according to the dealership. there are notes on the last invoice that the noise was described as "pad slap." everyone involved is acting as if this is a great unsolvable mystery, which seems ridiculous on a new car. i first came to the dealer with the problem with 512 miles on the car.
Just got the car back this past thursday from the dealearship, 2 and 3 from the list above were completed, and they were "unable to replicate noise" during a test drive. after driving around over the weekend i've confirmed that the noise is still present (though less loud and less frequent), and was able to capture it on video--after the turn signal turns off: [URL] ....
i'm not the most knowledgable or mechanically inclined when it comes to cars, so i don't really know what to think of this. google searches turn up that many people have issues with clunking sounds from floating calipers, some say that it's normal, other that it's not. this is my first new car, first car with floating calipers, first VW, so i feel i'm coming at this pretty blind.
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I've only owned my neon for 3 weeks. I have a loud knocking/clunking noise and it feels like the rear is trying to freeze up in reverse it knocks/clunks louder when i brake in reverse. Sometimes it will knock/clunk and feel like something is trying freeze up in normal forward driving (maybe one of twice every few days) but it happens every single time i reverse.
We have already replaced the rear struts as we thought this was the problem.
I'm getting frustrated I need a good car to drive my child to school and I afraid to drive this one but I don't have much of a choice. It has had a lot of recent work by the previous owner (my brother-in-law) including a new clutch, exhaust, tie rods, new brakes all around and brand new tires so i'd like to fix it because it's in great shape and runs well for it age.
Another piece of information that may be relevant is the car sat for roughly a year and half with no use but was regularly started although I don't think they moved it. I'm wondering if it could have something to do with the brakes?
The problem starting roughly 3 days after I bought the car I don't drive much but would like to fix this so we can take it on longer trips as it's the only vehicle we own that fits everyone in it. Our secondary is a 2 seater Toyota pickup for my husband to commute to work in and there's 3 of us so the car being in the condition it's in doesn't work for us.
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So my '01 E350 has been fine but tonight when I went to start it I didn't get a WTS light and the SES light was on and there was a weird number on my PHP Hydra that looked like r5 ? This happened a few times back to back so I tried starting it and it just cranked and cranked. Wtf? So I started pushing the button on the chip and all of the sudden I got the WTS light and the hydra flashed, now the chip was on tune 10 instead of 5 where it was when I parked it. I should also note that during these episodes there was a fairly loud clicking/clunking sound coming from the drivers front under the hood when I toggle the key on.. Sounds like maybe a relay? Louder than I recall ever hearing.
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Brought mine to the dealership they can't find the knocking noise. I asked the technician to Test drove it but still can't find the problem. Technician on the passenger side and we test drove it. He was able to hear it, but can't confirm if its coming from the pads or rotors. Its pretty anoying when driving at night when the roads are quiet. You can hear it even with windows close.
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Relay-clicking sound coming from under the hood? at low speed in transition from brake to accelerator.
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I had a toyota prius gen 3 last year where it had an engine knocking sound, where I tried every TSB and changed the spark plugs, spark plug cables, intake manifold, engine knots..... etc., nothing worked except the following video which solved the knocking completely with no return.
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When I start my 2012 prius the noise scared me. The motor shook an inch and a half first tow found nothing. It did it again drove it in nothing found could not duplicate. Third time towed and again nothing found. "It is safe to drive we can find nothing wrong". After asking for a manager and inquiring about lemon status I was given a car to drive. The service rep said a manifold would be in in about a month but the mechanic supervisor said there is no eta and we are working on it.
A week later they call the manifold was replaced and they finally duplicated the issue in one of the other three cars there with same complaint. I was getting 50 mpg until this started when I took it in I was getting 46mpg. Now after the first 300 miles since I got it back I'm getting 43.5mpg.
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The issue is, when driving at low speeds, especially after coming to a stop, I hear this intermittent knock that comes from the rear of the vehicle. I am not sure if it is coming from the outside or inside, but it really sounds like it is coming from the chassis.
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I have a 2010 Prius with about 20,000 miles.
We recently went on a long road trip and my wife hit something in the road. Since then I have noticed a sound when braking anytime I am going 0-10 MPH. It almost sounds like closing a lid on a box or something. It's not very loud, but I can feel it and hear it underneath my feet when I brake.
Perhaps something got dislodged when we hit the road debris?
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Our 2010 Prius makes a "stuttering" sound when braking under certain conditions.
Here are audio examples of this sound: Toyota Prius Braking Noise that Dealership Claims is Normal - Clyp
The sound only happens when we are gently applying the brakes while turning (either direction) at about 10-15 MPH, especially if that turn has even a slight negative (downward) slope.
It's like a clicking sound that repeats 5-10 times with maybe 0.1 secondsbetween each click.
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I have a 2010 Prius, solar panels, sunroof, JBL, the works. (I bought it used.)
Whenever I go over a speed bump at an angle, or over rough terrain, there's a big clunk from somewhere above and behind me. But I could never tell exactly where it's coming from. t First I thought it might be something loose in the sunroof, but I don't think so. I made my wife sit in the backseat while I drove over nearby speed bumps, and she kept pointing toward the area of the roof that houses the solar panels. Can they come loose? Or can the roof struts come loose?
Anyway, that leads to -- my mechanic is trying to figure out how much it would cost to get in there and take a look. He seemed to think that removing the headliner means buying a new headliner (i.e. removing it wrecks it.) That gets very expensive.
The clunk is very annoying, sounds like the car is coming apart. Maybe it is!
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I got my first Prius last week but something started happening I noticed a few days ago, that sometimes (between 30 - 40%) of the time when I brake there is a metallic plinking sound, and directly under where I let my non - driving foot chill out (which is basically the center of the drivers site floorboard), my foot can feel the plink as well
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My 2013 Prius with 25,000+ miles has developed a low “clunking” sound every time I stop and the rear of the car settles. It seems to have come on gradually and now it doesn't seem to get any worse. My dealer is unable to find the cause and there is nothing loose in the back end of the car. This isn't an awful sound but it’s very irritating and I’m embarrassed to give anyone a ride. I've driven a friend’s 2010 and it makes no noise when stopping. I’m about to go back the dealer again and attempt to get a manager to take a ride and see if he can hear the sound. The mechanic I dealt with claimed that he tried out a new car off the lot and it made the same noise – implying that I should just quit whining.
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Just bought an 05 yesterday. It has 193k. The steering seems to have some play and an occasional clunking sound when turning the wheel. I do not know of a dealer or an independent shop that will give me an honest opinion or quote..
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I have a 2005 gen 2 Prius, 106k miles. Recently in Florida, we had a heavy rainstorm, and I happened to drive it through a flash flooded road. Water was deep enough to reach my headlights. I was out within 10 seconds, then had my car towed. There was a clicking sound and white smoke (steam?) coming from under the hood. The car would start, and I could drive it if I wanted to. After talking to a mechanic, he said to let it sit for 30 minutes with the engine on. Like magic, it started to work like normal, check engine light went away.
Drove fine for 2 days, then the check engine light came back on. Had the codes read at autozone: P0103, and P0031. One day later, my car stalled out while I was driving, and the dashboard lit up like a Christmas tree. Red triangle, yellow exclamation, brake, abs, "problem" on mfd, etc. This site has saved me before, so I came on and thought it could be the MAF sensor. I cleaned it with MAF cleaner, but no luck. I order a new sensor, still no luck. My car stalls out seconds after starting it up. I cleaned my throttle body, still nothing.
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This is my new Prius C's engine warming up in the morning. The engine shakes once when starting up and I seems to be able to detect a slight knocking sound.
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