[turbopower]

Hello. Received my first 540ix 2021. And first this which i noticed howling humming sound from 30mph. Looks from suspension/ tyres...

New front bearings.
New 245/40R19 Michelin PS5 Non ruf flat
Correct wheel alignment.

Nothing helped... humming sound still with me...
I am reading many post, when guys had similar problem with G30 xdrive, but no solution...
Dealerships changing parts, but nothing... howling remains...

Maybe it is normal for new cars? Maybe New limo cars is less comfortable, than 15 years old, Ford Focus....?

I really want to resolve this G30 problem, but still did not find information...

[G30M]

mine (ex M340i) was traced to front diff. dealer put on hoist and listened.

[turbopower]

Extra info: more hearable this resonance sound in driver seat position. Mostly form 25 mph to 90 mph. After 90mph almost no resonance sound to ears.

[Ben90]

I have a similar issue where my car is vibrating from the rear and making a very annoying noise

Please see video below
Please can you advise?

[turbopower]

Mine not similar.

Mine like resonance sound. Fully howling noise, but low frequency. Very annoying noise :-(
If i resolve i will inform.

[gasoline]

Hi,
Is it humming in a pulsating manner, like once at every 1 second or less, other than continuous?

I have a problem in this manner and tomorrow I will have my front wheel bearing replaced. The mechanic says little noise from passenger side, but I am not so hopeful it will be solved. Anyway, I will share the result.

[turbopower]

Originally Posted by gasoline

Hi,
Is it humming in a pulsating manner, like once at every 1 second or less, other than continuous?

I have a problem in this manner and tomorrow I will have my front wheel bearing replaced. The mechanic says little noise from passenger side, but I am not so hopeful it will be solved. Anyway, I will share the result.

I am waiting your reply. Since 2019 still nothing solved this problem. All runs with humming (resonanse) sound/ noise....

I changed both bearing, M PS5 non ruf flat tyres... and then started read forums...

[gasoline]

Hi,
Unfortunately, replacing wheel bearing did not solve it.
My mechanic is blaming the drive shaft for imbalance issue. What I don’t understand is, say the cause is the damn shaft, why it generates noise at 0.5 second periods like wroom wroom…instead of continuous humming and with nearly no vibrations!

So I guess I will stop digging the issue and eventually sell the car.

[turbopower]

Originally Posted by gasoline

Hi,
Unfortunately, replacing wheel bearing did not solve it.
My mechanic is blaming the drive shaft for imbalance issue. What I don’t understand is, say the cause is the damn shaft, why it generates noise at 0.5 second periods like wroom wroom…instead of continuous humming and with nearly no vibrations!

So I guess I will stop digging the issue and eventually sell the car.

Yes, i read many forums since 2019, when new car owners had this problem since first miles and still no solution how to resolve humming till today after 5 years....:-(. Very sad, that 1998 VW Passat is less noisy, more comfortable, than premium class BMW G30, G20.

[gasoline]

Originally Posted by turbopower

Yes, i read many forums since 2019, when new car owners had this problem since first miles and still no solution how to resolve humming till today after 5 years....:-(. Very sad, that 1998 VW Passat is less noisy, more comfortable, than premium class BMW G30, G20.

Hi, good news!
Today the driveshaft center support was replaced and the problem is solved.
The mechanic says after a certain time the rubber like material inside the center support gets hardened and loses elasticity. So, this was causing periodic deep bass like humming noise.
I hope, maybe your problem is this and can be solved by replacement.

[turbopower]

Originally Posted by gasoline

Hi, good news!
Today the driveshaft center support was replaced and the problem is solved.
The mechanic says after a certain time the rubber like material inside the center support gets hardened and loses elasticity. So, this was causing periodic deep bass like humming noise.
I hope, maybe your problem is this and can be solved by replacement.

Did you had simmilar humming from 15km/h till 145km/h?
Same sound ( humming/ frequency.)?

[Nikeshd]

Hi Turbo, did you ever have any luck replacing this issue, just bought a pre owned 530d xdrive and having same issue, I’ve changed front left bearing, all new tyres, now my mechanic is saying to change the front right bearing and possibly driveshaft too as the boot by the hub was loose, not sure if this is the cause though as the car was on a ramp 2 weeks prior and the boot was intact, (mechanics a good friend, and I was with him at time of repair and had access to ramp so I know his not lying, however think he is getting frustrated with issue too and just wants to change whatever possible for me to stop bugging him)

[brazzare]

Hello :wave: are u guys having the same noise we're all complaining about in the G20/G21?

[KnottyMonkey]

I’ve had the same humming, howling, resonating sound for the last 2-3 months on my 2020 M550 with 40K miles. It only does it when on-power, and sometimes worse going up an incline. I can modulate the sound on and off by moving the accelerator by a fraction.

Off-throttle I get a sound like someone is shaking a bag of marbles behind a closed door. I get that off-power sound even when rolling down a hill in neutral.

I can’t tell if it’s front diff, torque converter, turbos, driveshaft…. I does seem to be coming from the front 1/3 of the car. I have an appointment at the dealer in a couple of weeks.

[CarlosM4]

Originally Posted by gasoline

Hi, good news!
Today the driveshaft center support was replaced and the problem is solved.
The mechanic says after a certain time the rubber like material inside the center support gets hardened and loses elasticity. So, this was causing periodic deep bass like humming noise.
I hope, maybe your problem is this and can be solved by replacement.

Mine was solved through the same part. Center Mount bearing.

[CarlosM4]

Originally Posted by brazzare

Hello :wave: are u guys having the same noise we're all complaining about in the G20/G21?

Yep