Passat (B7) :: 2012 - Loud Knock Noise From Underside Of Car
May 29, 2013
Passat (2012 3.6 SEL, 7500 mi) making a loud knock noise from the underside of the car. It happens, without fail, every time I pull it out of my garage, and often when I'm coming to a stop or pulling out of a parking spot, etc.
I have taken it to the dealer numerous times, only to have the "failed to replicate, operating as designed" on the service tag. The car has been in for so many other things, this is just another issue I mention to them every time. Since the other issues (aside from the rattles) have been fixed, I'll make this my primary concern...until something else wiggs out on the car.
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Experienced this (Loud engine knock or rattle noise) regarding the service bulletin (T-SB-0010-12)? If so, did you take your vehicle in for service?
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Last night when I went out into the garage, I heard the sound of a small, lower RPM electric motor. After walking around a bit, I found it coming from the underside of the back of the Camry. I got in and turned the key to the "on" position and it went away. The car had been parked for about 5-6 hours. I've never heard this noise before.
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1987 Buick LeSabre V6 w/automatic transmission. Suddenly getting a fairly loud "knock" from somewhere in the engine area. Only present at low rpm or idle, goes away at higher rpm's. Does not seem to be related to vehicle movement. "May" change some with gear shifting but can not really tell. Oil is full and no "idiot" light warning. Timing belt recently changed. Car seems to run fine, just making noise. Any clues???
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My 2001 Corolla w/80k developing a considerably loud spark knock/engine pinging noise under acceleration. It throws no codes but pings like crazy and it never used to. It's happened gradual over a long period of time. I've cleaned the throttle body and have done all regular tune up items with no improvement. It doesn't ping at all on 93 octane, does some on 89 and terribly so on 87. Why is this? Does the 93 octane just act a a richer mixture of fuel to alleviate the ping? Should this sign point me in the direction that it's definately a lean issue causing the pinging?
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There was a TSB for 2AR engine, Engine Knock/Rattle Noise at Cold Startup. My question is for those I4 camry owner, do you have these rattle sound when you start your vehicle at cold? I am not sure if mines have the same issue, but pretty sure is I can't find any differences between mine and this clip:
You Tube
So should I take it to the dealer? Or it's normal?
[URL] .....
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I have a noise with my new (2.6k miles) 2000 Diesel F250 Crew Cab. When I make low speed, right turns while crossing any type of depression in the road I hear a loud knock as if the left shock is bottoming out. There's an intersection near my house with runoff depressions across the road, I almost always hear the noise when making that turn. I've occasionally heard it coming from the right side when making a left turn.
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Ok so I bought this 2012 f250 and I had a couple questions.
1. I checked the Frame for rust n it was fine. I didn't look at the other parts until I got it home. It does have some light to moderate rusting on other areas under the engine compartment. Ex axle, drive shaft, some of the steering components. Exhaust Manifold is pretty rusty though. What can I do about that?
2. I noticed a little bit of oil, not dripping, on the underside of the front of the engine. I do have an extended warranty so i hope it will cover that. It's pretty extensive of a warranty. I took some pics of the area where there is oil. What could it be?
Most of the oil is focused around there ...
Top down view ...
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Whilst driving on the motorway at the weekend I noticed a very load high pitched noise which seemed to be coming from the rear/centre underside of the car. It lasted for about 30 seconds and then went. It has happened before about two months ago and after the first instance I had the haldex and rear diff oil changed. On both occasions it has been very wet on roads with torrentian rain.
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I was driving home and suddenly the underside of my car *popped* and it sounded like my muffler came loose. Very loud exhaust/turbo whistle.
Luckily I was very close to home and was able to pull in when it completely fell off and started dragging on the street. What part of my exhaust is this and what should I do to repair it?
I just finished fixing a ton of stuff on her and now she does this ?
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My 99 Jetta is rattling. The noise comes from the front center of the underside of the car. It started out only when I was accelerating and would disappear when in neutral or after reaching 40mph. Now its when its idling and driving at any speeds under 40mph (I think it just gets drowned out above that speed). I looked under the car and saw that there might be a piece causing the noise but I can't figure out what it is. It seems to be in-line with the exhaust system and its a metal, cylinder looking piece that has uniform holes in it. I'm just trying to figure out what is causing the noise, if I can fix it easily or if this is going to be a pretty expensive fix. (It has 165k miles on it, is a 2.1 gas engine with the new body type).
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I have a 4.3l that has a loud knock/squeak in the motor. It would remind you of a spun bearing. But it has a little bit different sound.
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I have a 2007 Camry XLE with 30,000 miles on it purchased new.I stated it up the other day after setting all night it had a very loud knock in the engine I shut it off and had it towed to the dealership. They started it up and wanted to know what happened they said it sounded like a rod out. They keep it several days and ended up doing a top engine flush and then replaced the spark plugs. They said it was a carbon build up.I asked if they suggest any thing to keep this from happening and they said they do not recommend using any thing. I thought carbon deposits were supposed to be a thing of the past. Does this still happen.
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Ive got a 2013 Accent with 16,000km on it. It has an automatic transmission. The noise is when i pass from R to D, or P to D. It is an intermittent noise, so it does not do it all the time. But when it does, it makes a loud "bang" that can be easily heard and felt in the floor. Ive had it checked by the dealer, but it never does it when its in the shop.
I always let the idle go down before shifting into gear and even if i hold the brake hard to change gears it does it anyway. It doesnt matter if the trans is cold or hot. And no, i never change gears when the car is still rolling, always when i have stopped completely.
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Daughter has 2012 focus, when starts up has loud squealing noise , then short time it quits until start up again. someone told her needed pulley bearings needed greased? if this is true how difficult is this to do and what is it?
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So this just started happening last night and I haven't had time yet to get the car in a rack. There is now a fairly loud knock (changes frequency with speed) coming from under my right foot while coasting in gear. It does not affect steering, braking, handling (from what I can tell), or acceleration. The knock it not there while coasting in neutral. My concern is that it may be a mount that is loose.
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The car: 2012 Tiguan SE 4mo (auto)
The noise: there is a loud pop/cluck/knock from the front drivers side footwell, can sometimes be felt in the pedals
When it occurs: Most frequently it occurs on deceleration. Letting off the gas, there is a slight delay then the noise. It doesn't happen every time. The intensity of it is very sporadic and unpredictable. In stop and go traffic, it is typically the worst, gently accelerate, let off the gas, loud clunk. During other normal driving, accelerate up to normal (55mph) speed, let off gas, quieter clunk, intermittent. Infrequently it makes the noise when I shift into reverse. I can also hear it faintly when i start the car sometimes.
There seems to be very little correlation to vehicle speed and the noise. It is typically louder at low.
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OK--2001.5 1.8t Tip, 85k, nothing but Mobil1 since day one religiously. At around 81k miles the t/belt tensioner seized & let the belt jump and bend a few valves. Had VW do the repair under the p.t. warranty. Engine now runs very well again except there is a knock noise that sounds an awful lot like a crank or rod bearing. The noise is worse with the engine fully warmed up and in drive or reverse. Took it back to VW, they said it's a bearing in the a/c compressor. Sounded like B.S. to me, since the noise is no different with or without the a/c on. I picked up the car & removed the a/c belt at home & found the noise was exactly the same. I've about had it with VW on this issue. Been back 3 times with the noise complaint, & the noise is getting worse!!
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Had very cold weather the past few weeks. Took my car out early in the morning last Thursday (after warming it up) and there was a loud squealing noise from the heater for about 2 minutes when I was driving five minutes from my driveway. Since then, I have this faint squealing noise that can be heard anytime that heater is on. It loud on the first two settings.
Took it to Toyota and they said it was normal due to the cold but from past cars I've owned, it looks like the blower motor could be on it's way out? Can this be true? Car has 11,000 miles on it.
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I just started hearing a loud click when I change from park to reverse and from reverse to drive. If I keep moving the knob between those three spots with my foot on the brake and hand brake off, I hear a loud click at each spot. Hard to describe... anyway, this only happens when I first start the car, by the time I get to work if I try doing that when I park there is no loud click sound. The thing is, I don't know if this was always happening and I just noticed it now, or if it just started.
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When it rained recently, the windshield wiper started making a loud squealing noise whenever it would wipe down. When I would spray the windshield fluid, the noise goes away but returns when I stop. No noise when it wipes up or when the rain is light drizzle or very heavy. So only noisy when rain is medium to heavy.
I thought maybe something sticky got on the windshield so used a regular glass cleaner multiple times but it's still noisy. What it could possibly be???
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