5 Causes of Lower Control Arm Bushing Noise (and How to Fix)

Last Updated on November 20, 2019

The lower control arm bushing is located in the suspension system of your vehicle. It is a rubber component which has two metal sleeves inside of it.

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It is responsible for allowing the control arm to connect to the frame of the vehicle and the wheel hub. That way, every time you turn the steering wheel, your vehicle will move smoothly in that direction.

In normal situations, you will not hear any noises coming from the lower control arm bushing. It will be silent and with no vibrations or issues. On the other hand, if there is a problem with the bushing, then noises can arise.

Top 5 Reasons for a Noisy Lower Control Arm Bushing

Someone who is unfamiliar with cars might not understand what is happening when they hear strange clunking noises. Although there are many reasons for why abnormal noises might occur in a vehicle, a problem with the lower control arm bushing will create very distinct noises.

These noises almost resemble a knocking sound from around the control arm area. Here are five of the most common causes of lower control arm bushing noise:

#1 – Worn Bushing

Bushings do not last forever. The more mileage that is put on your vehicle, the more excessively worn your lower control arm bushing gets.

You will first start to hear a light clunking sound but as the bushing gets more worn, the clunking sound will get louder and more consistent.

#2 – Loose Bushing

If you have a loose lower control arm bushing, then it will get knocked around between the metal components that surround it. This might not necessarily mean the bushing is worn.

Perhaps you drove over a bump which loosened it. Either that or a mechanic may have accidentally loosened it while working on another area of your vehicle.

Whatever the reason, loose bushings will consistently make the same knocking sounds.

#3 – Broken Bushing

A lower control arm bushing could break from being too worn out. It could also have been damaged accidentally by a mechanic who was working on something else.

A broken control arm bushing will create very loud clunking noises, which won’t be gradually louder like the worn bushings.

#4 – Driving on Uneven Terrain

If you drive over uneven terrain, such as gravel or a rocky road, then the knocking or clunking sounds that you hear will be amplified.

A bushing in good condition would not get loosened or rattle around from driving over this kind of terrain. But if the bushing is not secured in its place, the erratic motion of the vehicle as it drives over this terrain could make the bushings loosen more.

#5 – Hard Acceleration

If you have loose bushings, then you will hear the knocking noises the loudest as you’re taking off from a standstill. For example, when your vehicle is parked somewhere, and you switch the gear to drive and then floor the gas pedal, then the knocking will be the loudest at this point.

How to Fix a Noisy Control Arm Bushing

If the bushing is just loose, then it was either knocked loose or not installed correctly. Chances are, you will be able to save this bushing by just tightening it.

However, in most situations, your bushing will be worn out and you will have to replace it. Either way, you should take the vehicle to an auto body professional, so they can perform this repair or replacement job for you.

It is not a good idea to ignore the clunking or knocking noises because this could lead up to a steering malfunction where you won’t be able to control your vehicle’s direction anymore. It is best to get the problem solved at your earliest convenience.



  1. Hello
    I took my Honda to a mechanic tho thinking it was the control arms, I had both replaced I got my vehicle back and I still here the Klunk noise when I turn either left or right… please help

    • I’ve had clunking for ages any garages just tells me it’s something else.
      I took my car for a exhaust check as it was blowing. They said it’s the Flexi of which they said lower engine mount count be warn causing Flexi to break. Of which I said I keep getting clunking on acceleration and reverse ext.. and they said it will be the engine mount. Well I purchased a new cat and engine mount and got a different garage to fit it and upon inspection yes the cat was broke they seen the 2 rear arm bushes was unbelievably warn which would cause my knocking issues. Even my last mot these didn’t show up and I was getting knocking then. I’ve ordered 2 wishbones
      today so I’m excited to get them fitted and not to hear these dreaded knocking noises anymore.
      I found this web page very knowledgeable I’m getting the same symtoms as described

    • One of the car mechanic told me is better to change the lower system arm system rather than just the bushing. He diagnose the bushing is worning out.

      Can i just change the bushing?

  2. I had my Front struts and wheel bearing and sway bars links fixed after, I heard a unfamiliar clunking noise took it back he tells me my lower control arm bushing was gone I told him that was not like that before they fixed my other front end work. He said we dont have to touch that to do the struts and sway bar and wheel bearings this is all front end. The lower control arm is now messed up is it possible they did that when fixing it?

    • No, I would say the shop was telling you correctly. Good thing to just get it done, which i’m sure you already have done. I have had a shop torching to get off a ball joint and torched my cv boot shield and grease was squirting out and of course they said it was already bad and documented it. Which was partly correct as the inside boot was starting to leak and/or leaking but the outside boot was fine as I did already inspect that. What you stated should have no impact on control arm bushings imho.

  3. Just purchased 2016 AWD 5.7 police charger after the car has been driven for 20 min or so I get this clicking sound which seems to come from the centre right front when I slow down to a stop does not happen when the car is cold only after it warms up serviced and replaced brakes ie Rotors pads
    Any idea what it could be ???


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