Wednesday, April 10, 2024

Knocking Noise From Rear Of Car When Driving

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Check If The Clunk Is A Known Issue

Clunking Noise When Driving Your Car, SUV or Truck Over Bumps?

First, search online for any Technical Service Bulletins for your car that pertain to the noise. These bulletins are issued by automakers for known problems and often include options to fix your car, such as redesigned suspension parts. There are several sites online where you can search by your cars make and model or VIN for outstanding TSBs. Alternately, you can always call your dealership as they should have all of the up-to-date TSBs for the marques they sell.

Suspension clatter is a common problem which generates quite a few TSBs. Some of these entitle you to get the clunk fixed for free, while others may say that the noise is simply a characteristic of the vehicle and should be accepted as normal. Regardless, this is a good place to start.

Your Car Makes Light Grinding Or Squeaking Noises

What it could mean: A light grinding or squeaking whenever you brake is almost always because of poor or worn braking materials. If caught early enough, your technician will be able to service your brakesa process that might involve cleaning, lubricating and adjusting the materials. Some brake pads have squealersa piece of metal that rubs against the brake rotor once the pad material gets low. If you hear this cyclical noise even while driving, your brakes may need replacing.

Heres what to do if your car shakes when braking.

Tapping / Knocking Noise From Passenger Side Rear Wheel

1 Posts. #6 · Mar 16, 2018. My daughters friend hit a big pothole yesterday and it started making a clunking noise in the right rear whenever she hit a bump. I looked at it for her and found that the rubber ring that goes under the large washer of the upper strut mount had. An engine knocking while accelerating is a problem faced by many people in the course of driving. This sound is not only disturbing to the ears but also has a destructive effect on the engine and its internal parts. The causes of engine knocking sound may range from bad fuel, faulty spark plugs, or even dirty combustion chamber Complete rear disc brake failure on a honda accord 2009 with approximately 20,000 miles. Replaced rotors and brake pads by a firestone repair shop, as dealer was not open on a saturday. In the 2 days time we heard a noise coming from the rear of the car, the noise increased by about 300%. Brakes were down to the metal. Front brakes were fine When I push down on the front left wheel, it makes what I would describe as a suction sound when the car bounces back up. I cannot replicate the knocking sound by pushing it

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Knocking From Rear Of Car

Yorkie666 said:Mine had a knock from the back of the car from new. Having tried everything suggested above, I put the seat backs down and the noise stopped……the dealer ended up just bodging the ‘staple’ or whatever you call it on the bodywork by wrapping some insulation tape found it to make it fatter as the seat back was rattling backwards and forwards . It cured the problem!

Knocking Sound From Car While Driving Straight And Turnin

WARNING, DO NOT DRIVE THIS CAR. How To Find Suspension ...
  • If you hear a knocking sound when you depress the brakes on your car- especially when the car has almost come to a complete stop- the cause may be the rear brake linings that are sticking. You can get to the root of the issue and isolate it-by, pulling the handbrake- allowing the brake linings to drag a bit
  • A belt that is slipping, stretched out or glazed with something like engine oil might start to make noise, particularly when the engine is cold. 1. Rod Knock. The last possible cause of a knocking noise from your engine is called rod knock. This is the loud clacking noise you may hear if the piston rod bearings become damaged or misaligned
  • 326 Posts. #6 · May 9, 2018 The upper front diff bushing is mounted to the frame rail just in front of the foot rest. It’s a common failure point and a real pain to replace but, not impossible. When under acceleration the diff will twist back and the housing comes in contact with the frame rail mount just enough to make a dull rattle
  • Can anyone confirm that worn out/torn rear upper control arm bushings would make a knocking sound at 15mph and under, when turning, first accelerating and just generally driving around a parking lot. I installed rear subframe spacers the other day, while doing it I was hoping to find this knocking noise I’ve been hearing in the rear, no luck

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Rattling In A Car Under The Hood

If your car is running but youre not driving and you hear a rattle, you might be puzzled. There are a couple of items that could cause the issue, though, even when youre not driving. Loose exhaust or a rusted exhaust heat shield can vibrate, causing quite a racket. Its not nearly as devastating as a failing catalytic converter, though

If you have a car making a rattling noise when accelerating, your catalytic converter is probably on the outs. When your cat starts rattling inside, its only a matter of time before it causes a blockage that makes your engine run poorly.

Catalytic converters are one of the most expensive exhaust components. Its not uncommon for your catalytic converter replacement to cost more than $1,000, and theres usually more work that needs to go along with that.

Quick Answer: What Could It Be

A knocking noise under your car is something that makes drivers cringe when they hear it. Nobody has time for car trouble. Knocking can be caused by any of the following things.

  • Bad Tires
  • Struts/Strut Mounts
  • Stabilizer Bar/Right and Left Control Arm

It is important to keep your car in a safe operating condition. This is accomplished by routine maintenance and addressing problems as soon as they arise. One problem you could encounter is a knocking noise. Diagnosing the problem is the first step in repairing it.


  • 3 Wrap Up
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    Alternate Sources Of Noise

    Sometimes what you think is a suspension clunk could be something else entirely. For instance, take the exhaust systemthe muffler, headpipe and tailpipe, plus the catalytic converter. If everything is in the right place, but the hangers are loose or broken, it’s likely that there will be occasional contact that clunks between these components and the chassis or driveshaft. Once your exhaust is cool to the touch, try forcing the system from side to side to see if you can duplicate the sound.

    A broken motor mount can also cause a solid thump. Motor mounts can delaminate after theyve been soaked repeatedly in hot engine oil. Alternately, you may just have a couple of loose bolts. You will notice this problem more often when you get on or off the throttle, but it won’t be detected over bumps.

    Car Noises To Be Concerned About

    BMW DIY Video – How to Diagnose clunking noise from the rear and fixing it.

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    With a twist of the key or poke of its start button your vehicles engine should fire up with the urgency of a physician responding to a code blue.

    Of course it should also idle as smoothly as a sewing machine running a line of chain stitches. If this isnt the case you ought to take note because something serious could be awry.

    The same is true for the rest of your car or truck. It should operate as silently as a napping kitten and feel smoother than satin underwear. Modern vehicles are engineering marvels built to exacting standards, but as with anything crafted by man, things will go wrong and often in spectacular fashion. If for some reason your car is making uncouth noises heres a small sample of what could be going on.

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    The most popular service booked by readers of this article is Clunking noise when I drive over bumps Inspection. Once the problem has been diagnosed, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. YourMechanicâs technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. We currently cover over 2,000 cities and have 100k+ 5-star reviews… LEARN MORE

    Loose Or Damaged Lug Nuts:

    A light knocking or rattling can be caused by loose or damaged lug nuts.

    Lug nuts are on every wheel of your vehicle: Lug nuts are used to secure a wheel to the hub. A wheel can have anywhere from four to six lug nuts per wheel. Lug nuts do not typically wear out and require no regular maintenance.

    How to deal with a damaged lug nut: Lug nuts can be damaged by improper installation or over tightening. When a lug nut is loose/damaged, it can create a light knocking or rattling sound. If one is loose, tighten it and if one is damaged, you can likely find a replacement at your local auto store.

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    Knocking Sound As Car Rocks Back And Forth Motor Mount

    Jeep Wrangler Knocking Noise When Accelerating. Let’s look at a few real-word reports and experiences of Jeep Wrangler owners. User Experience. At a stop light and accelerating or while i am coasting i hear a god awful knocking noise in my rear end.. and i can feel it coming from the rear end. I am hoping to god its not my wheel bearings. Straight away I noticed a knocking/clunking sound coming from the rear middle of the car when going over speed bumps or any rough road surface. This happens regardless of the speed when going over bumps and is really irritating. I never used to get this problem before and the car drives like a dream, apart from this 1 issue now Engine Knocking Noise problem of the 2004 Dodge Durango 9. Failure Date: 02/04/2015. The contact owns a 2004 Dodge Durango. The contact stated that while driving at approximately 40 mph, a loud knocking noise emitted from the engine as the front end vibrated severely. The vehicle stalled without warning If you hear a groaning, rubbing, whirring, knocking, or grinding noise when driving your car, it could mean you have a bad wheel bearing. Since wheel bearings are usually built as a part of the wheel hub assembly, it likely means the whole wheel hub assembly needs replacing

    Thumping/knocking Noise Coming From The Rear

    5 Reasons Why a Car Makes a Knocking Noise When Driving ...

    As of lately my car started to make thumping/knocking sounds whilst driving over speed bumps I drive a 2001 renault laguna 1.8 16v with about 218,000km on the clock.

    It doesn’t happen while driving on flat road, i can only hear it when driving over speed bumps.

    it kind of sounds like someone is giving a mean knock on a door.

    does this mean that my rear suspension is bad?

    UPDATE: I took a look at the back of my car And couldnt really pull a conclusion myself. I took it to my local garage and they told me the shockbreakers were busted. They have been fixed and the sound is now gone. Thanks for all the suggestions.

    • 1Welcome to the site! How fast is ‘regular speed’? Does it only knock once per speed bump?Jun 14 ’16 at 13:31
    • 1Jun 14 ’16 at 15:35
    • 1If you drive over a speed bump at an angle , is it better or worse? And do you get one “thump” or two? SteveRacerJun 14 ’16 at 17:17
    • Regular speed would be about 10-15 mph, I usually just hit the bumps with both wheels. And it only bumps once or twice per speedbump.Jun 15 ’16 at 6:02
    • 1Try pushing down on the back end of the car and see if you can get it to make that noise. If so, your shocks are probably shot. You could also see if you can get a friend to hop on the back bumper while you look underneath if it’s a missing sway bar bushing or other exposed suspension component you might be able to see what it is.

    Here are a few things to check in the rear of the car to find out what is going in

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    Your Car Sounds Like An Unbalanced Washing Machine

    While driving, you hear a wobbling noiselike an unbalanced washing machine on the high spin cycle.

    What it could mean: If you hear this sound, pull over right away, and check your wheels and tires. You may have loosened wheel nuts, which could result in the wheel falling off, or low tire pressure, which puts you at risk for a tire blowout. If your wheel nuts are loose, jack up your car slightly to take some of the weight off and use the lug wrench to tighten the wheel nuts. If the tire pressure is low, either fill it to the proper specification or swap it out with the spare tire.

    Constant Knocking Noise Rear Drivers Side

    Long time user, first time poster!

    I know “knocking noises” are prevalent in many questions but I’ve not quite found the answer to this one…

    Bit of history, it’s 2002 Civic Type R. Over this weird summer, it’s basically sat on the driveway for 5 months…with the occasional start up and half mile round trip. It’s quite clear that the brakes have suffered, there’s visible rust and they grind when moving . Today, however, when I’ve gone for a little run, it’s now developed a constant knocking noise from the rear drivers side, that increases in speed as you do and vice versa. It’s not just when I accelerate, it’s also when coasting. It’s NOT quiet, it’s easily heard. Obviously, I didn’t take it particularly far, as I felt like the wheel could pop off at any moment…

    I’m convinced that the brake issue, born from a lack of use, is part of the problem, but I’ve not come across this before. There doesn’t appear to be a leak anywhere, from the lack of evidence on the driveway.

    Any ideas?

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    Diagnosing Worn Or Damaged Control Arms

    Control arms tend to wear out on vehicles over time during normal road conditions. Most vehicles are driven on other areas rather than just on roads. Most operators tend to think that cars are like trucks and can take off-road adventures with no problems. This results in wearing out the suspension parts more frequently.

    Materials Needed

    • Flashlight

    Step 1: Grab a flashlight and visually check the control arms of the vehicle. Look for any damaged or broken control arms or related suspension parts.

    • Note: If you see any broken suspension parts, you will need to have it repaired prior to test driving the vehicle. This would result is a safety matter that needs to be addressed.

    Step 2: Drive the vehicle around the block. Listen for any clunking noises.

    Step 3: Drive the vehicle over bumps or potholes. This checks the condition of the suspension as the tires and suspension moves around.

    Step 4: Step on the brakes hard and accelerate hard from a stop. This will check for any horizontal movement within the suspension system. A loose control arm bushing may not transmit noise when in normal operation, but can move around during a hard stop and fast take off.

    • Note: If your vehicle has been in an accident before, the control arms could be set back on the frame to fix an alignment issue. The set back can result in problems with the control arms coming loose or deteriorating the bushing faster than normal.

    Preparing the vehicle to check the control arms

    Materials Needed

    Common Reasons For Knocking And Squealing From Your Vehicles Suspension

    Toyota Sienna knocking noise from back while driving

    Your vehicles suspension is made up of several different components that help absorb shocks, brake, and turn. If you hear a knock or other odd sounds coming from below, the culprit is usually one of three parts of your system your tie bar, ball joints or sway bar. All three of these can wear out with enough use, which could lead to some serious issues including total loss of steering control.

    Youll usually be able to tell if these parts are going bad easily weve listed some of the most common issues below:

    • Check your tire tread if its not wearing out evenly, there might be a problem with your alignment that usually stems from an ineffective suspension system.
    • If youre hearing humming or grinding sounds when turning, your tie bar might be starting to wear out as well. This is the part that helps with steering, so having it go bad is something youll want to avoid.
    • For this reason, your steering could also feel looser than normal, since less power is concentrated on turning your wheels with a faulty part.
    • Knocking or squeaking sounds are usually a result of your sway bar or ball joints wearing thin, both of which help to absorb shocks and keep you moving forward with smoothness.

    In any of these cases, its best to see a certified technician for service right away!

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