[greekcs]

Originally Posted by Kazuya1373

Hey guys. I had the same issue with noise on bad roads. After some digging i found that part nr. 31106891829, Vibration absorber spring strut
150HZ / 220HZ,is missing from front suspension. Part is for cars with msport suspension and run flat tire functionality.
I have standard suspension with runflat tires and that part was missing.
After installing part on both suspension struts, i have to say, noise is gone. I can still hear when transition from good to bad asphalt is happening, but now is much more smooth and less noisier.

Part nr. 8 from link. http://a.realoem.com/bmw/enUS/showpa...diagId=31_1557

I have said vibration dampers installed. I actually removed them at one point to see if it made any difference but no change.

[dkozinets]

Originally Posted by Liamjay

That is exactly the noise!

I fixed this problem! They figured out that rear wheel bearing was broken.
Part number: 31202408656

[Hubert_PL]

Dear Friends,

I carefully read all the posts in this thread, trying to find the answer why my G20 320i (without M suspension) bought in March 2021 is so noisy. Exactly like some other colleagues tryin to figured out about annoying noise from the front wheels, as described here on the forum.

I was most puzzled by the fact that it appeared from a mileage of about 4,000 kilometers. Up to this point it was perfect. It bothered me. Yesterday, with the odometer reading of 27,000 kilometers and signaling the need to replace the rear brake pads, I went to the BMW service station in Warsaw (PL). Imagine my surprise, I left again in a quiet car. No annoying noise. Nothing. Apart from the above, only the inspection, oil and cabin filter change were performed.

Naturally, I have a hard time understanding how rear brake pads could cause an annoying noise in the front - exactly as you all confirm here, as in the recordings posted in previous posts. I would like to add that about month ago I replaced the tires with new winter Bridgestone ones and the wheels were humming as if they were summer tires.

I recommend you to check it out, but since yesterday I am in shock. I just got in the car to go for a ride again - no changes, silence inside as yesterday.

[Hornet]

Hubert's post above, very interesting. (That "after 4000km" bit was identical to mine..)

A quick update from me also:
Performace brake discs (slotted), calipers and new pads installed to the front axle. My initial impression is that the noise is indeed less annoying now but it's still there unfortunately.
Technincian's impression was the same as mine. However now I'm not so sure anymore that the sound comes clearly from the front. I need to do longer testdrives obviously.

So Hubert's post got me thinking. That wheel bearing story above is interesting also.

[erawamai]

Does anyone have this problem in 2021 year build? I ask because I'm about to become an owner of a may 2021 g21 330i with m adaptive dampers.

[Lakeside]

Well heck, I am trying to buy an M340i via new build slot and between this and the deleted equipment.. not encouraging. I'm reading the thread beginning to end, will keep me off the streets for a bit.

All of the information is really valuable, great thread.

Question: Does this issue affect the G26 as well?

[HighlandPete]

Originally Posted by brentsg

Well heck, I am trying to buy an M340i via new build slot and between this and the deleted equipment.. not encouraging. I'm reading the thread beginning to end, will keep me off the streets for a bit.

All of the information is really valuable, great thread.

Question: Does this issue affect the G26 as well?

I've been following and contributing to this topic. Just be aware each user complaint/experience may not be exactly the same issue. There is a common thread here, but some oddities as well.

[Yossi123]

FYI this year once again I noticed the noise being WAAAY worse after switching to winter tires, 18" RFT. My summer setup is also 18" but non-RFT - the latter were the factory spec, co maybe I am missing the vibration dampers? Is is possible to check for them without removing the wheels?

[erawamai]

Originally Posted by Yossi123

FYI this year once again I noticed the noise being WAAAY worse after switching to winter tires, 18" RFT. My summer setup is also 18" but non-RFT - the latter were the factory spec, co maybe I am missing the vibration dampers? Is is possible to check for them without removing the wheels?

In case anyone wants to see what it looks like.

Vibration Dampner - g20 330i - Car came with Pirelli PZ4 runflats from the factory.

[Yossi123]

Originally Posted by erawamai

In case anyone wants to see what it looks like.

Vibration Dampner - g20 330i - Car came with Pirelli PZ4 runflats from the factory.

Thank you so much! As I suspected, because my car left the factory on non-RFT tires I don't have it installed. And now after I switched to winter RTFs this may be the reason for the more noticeable noise.
I will ask my dealer about it and see what they will tell me.

[erawamai]

By way of update -

I took delivery of my G21 M Sport 330i - RFT Turanza T005 - Adaptive M suspension.

No grinding noise so far (phew!). The vibration dampeners are fitted.

I mentioned this in another thread but my prior car was a early 2020 330i G20 also FRT and Adaptive M suspension. That car, despite identical suspension, rode harder (Non scientifically by about 15%).

BMW definitely made revisions to the suspension of the car for the 2021 model year. The ride in comfort is noticeably more comfort orientated. I suspect certain markets (the USA) complained that the initial Adaptive M suspension was too hard.

[domi1234]

I hawe also this grinding noise on g20 330i m sport brakes blue..how many hawe changed bearings in rear wheel? Hawe somebody checked drive shaft bearing?
Im gonna change rear brake pads and check if raer bearings make some noise ...

[fejstfnt]

I too have the mentioned sound on a g20 m340i "regular" m sport brakes. I think it showed up, or at least became much more obvious after changing from the summer 19 inch M792 wheels to the winter Continental TS860 SSR 18 inch M790 wheels.
In about 3 weeks I will change back to summer wheels and I can report what the difference will be.
Has anyone figured out what the problem is?

[G30M]

i have a higher pitched whine noise from the left front. 11,000kms (just over 6000 miles)

not sure what it is

[domi1234]

Here hawe made a video of the noise..the phone wass in the trunk..i accelarate to 3 gear, then you cann hear wining noise whenn i press acceleration..huming noise is werry loud, hawe replaced middle shaft bearing same noise..the wheel bearings could not be because noise is always same whenn you go right left brake, i think if the differential make noise?
https://youtube.com/shorts/_9Ve2E82aWQ?feature=share

[domi1234]

So hawe found grinding noise it wass bearing inside differential..changed with new perfect

[whitemamba]

aye!!
i own a 2021 330i with 47500 miles. I've been hearing that "howling" sound as well for about 2000 miles now - you can only hear it when you try to keep the car at speed (no deceleration nor acceleration) - it happens at ALL speed. I finally went to the mothership - I requested a mechanic to test ride with me a listen to that noise - As soon as we got out of the lot, the dude said "i hear it!!!!" i was so relived!! -
Today i got a call from BMW - Rear axle failed and they will replace it - all under warranty!! mind you i currently have 47K miles on it ....pheeeewwww

[Triiple_E]

Originally Posted by Glaede

Has anyone tried a 2020 G20 M-Sport model?

First time posting in here, been hunting for someone with this issue and finally found this thread! I have a M-sport 2020 g20 RWD and started hearing this too! Currently looking for a solution, its taking the fun out of driving

[M340ix.be]

Hi, first time for me also, experiencing this noise from the day i picked my premium 2019 M340i touring.

I would describe it as a resonance effect from rolling noise perceived in the cabin (mainly from driver position coming from passenger footwell).

BMW denies the car has anything, my independant and trusted mechanic immediatly noticed it during the first test drive.

As
- it's speed related (in a strange way) starting at 40kph and not changing in intensity or frequency,
-it seems to be affected by temperature


==> could it be related to the active grille operation logic ? Having them closed could transform our engine bay into a resonance box ?

Someone already tried something with that in mind ?

[deluxe101]

Same issue with 2020 340dx, 112000km.

Already tried:
tires change - no effect
left front bearing - no effect
noise and vibrio isolation of the wheel arches done - no effect
oil in front differential changed to another one with different viscosity - no effect. Moreover I compare the replaced oil from X5, which was replaced like 1 hour before mine and my oil - absolutely no difference.
front driveshaft was removed (on another car) - no effect
transfer box was turned off on another car - no effect

The only thing left - front differential replacement. I was sitting in the car, while it was lifted up and made 160 km/h and a technic was listening to the noises, the only thing that he mentioned that front differential making some small vibration when he compared his noises with the noises from rear differential.

[M340ix.be]

Originally Posted by M340ix.be

Hi, first time for me also, experiencing this noise from the day i picked my premium 2019 M340i touring.

I would describe it as a resonance effect from rolling noise perceived in the cabin (mainly from driver position coming from passenger footwell).

BMW denies the car has anything, my independant and trusted mechanic immediatly noticed it during the first test drive.

As
- it's speed related (in a strange way) starting at 40kph and not changing in intensity or frequency,
-it seems to be affected by temperature


==> could it be related to the active grille operation logic ? Having them closed could transform our engine bay into a resonance box ?

Someone already tried something with that in mind ?

Edit, nothing to do with what I explained, I hited a dear an destroyed the active grill system, nothing changed in the noise before and after repair.

In the meantime, i tried to soundproof wheelarches, no effect

I noticed today that the front wiper trim (part 1 on the picture) was not clipped properly on the right of the windshield (car is LHD). I fixed that I'll give you an update.




Also, while soundproofing wheelarches, I was surprised that the water drain outlet (part 6) was located directly behind the wheelarch trim, nearly touching it. This is not surprising if road noise comes through this plastic piece.

[deluxe101]

Originally Posted by M340ix.be

Edit, nothing to do with what I explained, I hited a dear an destroyed the active grill system, nothing changed in the noise before and after repair.

In the meantime, i tried to soundproof wheelarches, no effect

I noticed today that the front wiper trim (part 1 on the picture) was not clipped properly on the right of the windshield (car is LHD). I fixed that I'll give you an update.




Also, while soundproofing wheelarches, I was surprised that the water drain outlet (part 6) was located directly behind the wheelarch trim, nearly touching it. This is not surprising if road noise comes through this plastic piece.

That’s interesting. I am discussing same issue in 530 topic, because there are more active. Another thing me and another guy noted- it was quite cold in January, like -20-25 degrees C, and there was no noise for some time, like first 30 mins it was quite. From one point of view it could be oil inside shafts or in front diff, however it also could be some metal/plastic parts that are vibrating when they get warm.
Please update if anything clanged after you clipped part 1