Rear suspension thump

hooked · 01-05-2023, 03:18 PM

Quote:

Originally Posted by PNTDG42

I was listening, and it took a while before I covered a section of road that made it audible, but I heard it. It seems particular to the type of bump, but I definitely hear it

In mine it's loudest between 35-40 MPH in sport mode. Whenever the rear wheel(s) move up and down - even over the slightest imperfections in the road like asphalt crack filler they use sometimes - the noise is there.

Lohan · 01-08-2023, 08:55 PM

Quote:

Originally Posted by Jack@AUTOID

Thats mega info. Thank you!

I took delivery in Nov 2022, 500 miles, ZTK. I have the sound as well. It sounds to me like a dead strut. Like a dry strut. It's when the suspension is compressing and rebounding over a road with a specific surface texture. So I'm pretty comfortable that's where BMW is going to have to focus to fix it. Glad to see comments that BMW is looking into it. Even gladder if they find a software fix they can push to us. Doesn't seem to hurt the handling, but I'm pretty slow. Glad to see so many folks raising the issue and confident BMW will respond to the obvious validity of the issue.

Jashue · 01-09-2023, 08:44 AM

I'm so glad I stumbled upon this thread.

Count me as another with the issue. It all started around the first week of December. I had just installed my winter setup— consisting of alternate wheels wheels with snows. To my chagrin, I needed spacers for the new wheels and without knowing much about that realm I attributed the new rattle to the wheels. I mentioned to to the installer (an aftermarket shop, not the dealer) and he told me that the spacers are locked to the wheels and that there should be no play or rattle associated with them. I took his word for it, but the timing of this new issue made me wonder...

But speaking of timing: what else happened during the first week of December? Well, for one— that's when it got cold. Others are reporting that the clunking noice has intensified since winter has come. ALSO, unless I am mistaken, that's when we all got our over-the-air software update. It has been suggested elsewhere in this thread that there could be a software variable associated with the adaptive dampers at play.

I'm living with it, but I'm pretty OCD and this is driving me kind of nuts. I had the car for six months and 14,000 miles before I noticed it. I would have noticed if there was a clunking noise before. I'll be monitoring this thread with great interest.

Boxtyp3 · 01-14-2023, 12:31 AM

Following...having the same issue. Noticed mine around a month after taking delivery (Oct. '22).

Jabmwo · 01-17-2023, 10:25 PM

hey guys, as I mentioned before my M240 has the same problem. Dealer confirmed and replaced the rear strut and strut base. Noise is still there but now they say is normal, that it's the exhaust in sport mode (my rear end). Does anyone have a video/recording of the sound? thanks

hooked · 01-19-2023, 09:23 AM

Quote:

Originally Posted by Jabmwo

hey guys, as I mentioned before my M240 has the same problem. Dealer confirmed and replaced the rear strut and strut base. Noise is still there but now they say is normal, that it's the exhaust in sport mode (my rear end). Does anyone have a video/recording of the sound? thanks

It's based on the rear damper movements, not the exhaust, so they are wrong and/or just trying to shuffle you along - sorry. Also, the noise IS present in Comfort mode so what they told you doesn't makes sense on a couple of fronts.

BMW needs to fix this or they will be looking at a bunch of lemon law lawsuits and/or a class action. The model clearly has an engineering defect. I say engineering since it doesn't track the hardware and it doesn't seem to be a production defect. Manufacturing can be building these things 100% perfectly and 100% of them will be flawed if the software has a rear damper bug or the engineering design is bad. I know they have these dampers as an option in the 3-series, so unless those models are having issues too, they should be able to fix it for the 2-series.

My M240i just updated to 11/2022 firmware (previously had 07/2022) and the noise is still there, maybe even more apparent than before.

They *did* fix the bug where you would turn off the steering wheel intervention OFF for the lane assist and it would still try to pull the wheel out of your hand! So they clearly have some MAJOR firmware bugs that got past their QC team!

If the next firmware doesn't fix the damper firmware, it might be time to call a LL attorney. My car is ~3.5 months old but I don't want to wait too long if BMW is going to pretend this isn't an issue. It is seriously detracting from the ownership experience of what is an otherwise excellent car.

Saturns · 01-19-2023, 11:28 AM

I think I heard that very faint low sound you guys are mentioning about. Sporadic low thump rear passenger area. A low frequency thump like when something closes in a vacuum seal.
Truthfully sounds to me like the valve in the right exhuast. In sport+ mode on slightly bumpy road when I feather the throttle on/off/on/off I can make the thump happen. At least for me seems like the exhuast valve. I'm presuming if one does the hack to fix the valve open all the time it won't do this sound.
Anyone here that has exhuast flap held open and or change of exhuast have the thump issue?

Jabmwo · 01-22-2023, 10:44 AM

Hey Saturns, I think you are describing other problem, the cluncking/rattle in my M240 is independent of RPMs, it intensify according the condition on the road. You can coast in N and hear the rattle in a bumpy road.

jmelaw · 01-24-2023, 09:49 AM

Quote:

Originally Posted by Saturns

Anyone here that has exhuast flap held open and or change of exhuast have the thump issue?

Yes--I do (pulled fuse).
Sound still there, worse since software update and worse since cold weather. Has nothing to do with exhaust (sadly, b/c it would probly be an easier fix).

Saturns · 01-25-2023, 10:19 AM

Quote:

Originally Posted by hooked

They *did* fix the bug where you would turn off the steering wheel intervention OFF for the lane assist and it would still try to pull the wheel out of your hand! So they clearly have some MAJOR firmware bugs that got past their QC team!

I just turned this off a few days ago...it was an option on 23 IDrive8. Almost got into an accident when this kicked in and I slightly moved over to the left because the car in the right lane drifted slightly into my lane and when it corrected there was a patch of snow/ice on the road...car drifted for a split second.... the wrong way....at highway speeds...

Bandit009 · 01-28-2023, 04:39 PM

Dec. purchase of a 2023, with idrive 8, wheel and cooling package. Have the "thump". Passenger side by rear wheel. Haven't figured it out. Patiently waiting.

BG42 · 01-29-2023, 05:03 PM

Its been kind of cold here I noticed today it wasn't as noticeable coming back from Costco, maybe it was the extra weight maybe it was just stuff muffling it who knows.

Halfisherman · 01-29-2023, 07:34 PM

I have a 11/22 build G42 with the perf pkg and I am experiencing the thumping or rattle in the right rear. As many have mentioned it appears to be the suspension. I didn't notice at the of delivery with the package supplied 4s summer tires. I had the tires swapped in the first 300 miles with the 4s all season and have noticed the sound, car has around 1200 miles to date.

harcos · 02-02-2023, 12:19 PM

I just saw a post about this on a German forum.
To summarize :
The guy dropped the car for this problem.
According to the dealership's after-sales adviser, only vehicles with adaptive suspension are concerned and the subject is a priority at BMW.
BMW gave instructions to replace the rear shock absorbers: he does not remember very well but it would be necessary to replace those which have the number which end in "1" (part identifier) by those which end in "2".

He will have noticed a significant improvement but has yet to confirm it over the longer term.

G42M240 · 02-02-2023, 06:03 PM

Quote:

Originally Posted by harcos

I just saw a post about this on a German forum.
To summarize :
The guy dropped the car for this problem.
According to the dealership's after-sales adviser, only vehicles with adaptive suspension are concerned and the subject is a priority at BMW.
BMW gave instructions to replace the rear shock absorbers: he does not remember very well but it would be necessary to replace those which have the number which end in "1" (part identifier) by those which end in "2".

He will have noticed a significant improvement but has yet to confirm it over the longer term.

Hopefully there is an updated part # and a TSB for us to take our vehicles in and have it rectified without much hassle.

hooked · 02-03-2023, 10:32 AM

Quote:

Originally Posted by harcos

I just saw a post about this on a German forum.

Can you provide a link please?

harcos · 02-03-2023, 10:56 AM

Quote:

Originally Posted by hooked

Can you provide a link please?

https://www.2ertalk.de/threads/7056/page-3

Post 52

Last post (page 4) says that the problem would be resolved on vehicles MY 2023 produced since january BUT to be confirmed

hooked · 02-03-2023, 11:39 AM

Great find harcos!

Derwatt posted:
In the case of vehicles from customers who have contacted their dealer about the noise, BMW has given instructions to replace the rear shock absorbers. The shock absorbers originally installed (i.e. during vehicle production) have an incorrect identifier which as far as I remember ends in "1" and would have to be replaced by ones with the correct ID ending in "2."

My rear dampers were replaced in late Nov/early Dec but maybe with the wrong ones (the same parts ending in "1" it was built with)? This would also point to my dealer being incorrect (although they did say *best guess*) that there may be an EDC firmware update forthcoming.

Later on in the thread Derwatt asked Rollerblader to provide his source for this statement:

According to BMW, the "problem" in the vehicles from production Jan 2023 has been fixed.

If true, these should be getting to customers now and if they are NOT exhibiting the noise, then we know BMW has implemented the fix and hopefully a bulletin will follow shortly thereafter. Stay tuned.

harcos · 02-03-2023, 12:07 PM

To be careful and before declaring victory too quickly, you will probably have to wait a little to see if this is really the cause and the right solution (shock absorbers or EDC update).
I don't know where it is possible to find this "final number".
I don't know if mine is affected because it hasn't been driven yet, but I follow the problem regularly

hooked · 02-04-2023, 11:41 AM

Quote:

Originally Posted by harcos

To be careful and before declaring victory too quickly, you will probably have to wait a little to see if this is really the cause and the right solution (shock absorbers or EDC update).

Yup. Until my car is dead quiet on all 4 dampers/corners, it is still a problem.

Tryboz · 02-07-2023, 11:38 AM

Took my car for an oil change and explained the noise to my service tech. My appt was just for the oil so not alloted to diagnose the issue, just alerting them so BMW has more complaints on file. They do not have any tech bulletins that he could see. Just giving an update to the forum

Value · 02-08-2023, 08:49 AM

Very late to the party lol - I haven’t heard this thump since I installed coilovers. Ive had them installed for a few months now. I’m guessing it’s something to do with EDC and or the shocks. I installed Kw’s and deleted the EDC.

Nobody else is running coilovers?? Shesssh.

01-09-2023, 08:44 AM	#157
Jashue Private First Class 203 Rep 143 Posts Drives: 2022 B58 G42 Join Date: May 2018 Location: Syracuse iTrader: (0)	I'm so glad I stumbled upon this thread. Count me as another with the issue. It all started around the first week of December. I had just installed my winter setup— consisting of alternate wheels wheels with snows. To my chagrin, I needed spacers for the new wheels and without knowing much about that realm I attributed the new rattle to the wheels. I mentioned to to the installer (an aftermarket shop, not the dealer) and he told me that the spacers are locked to the wheels and that there should be no play or rattle associated with them. I took his word for it, but the timing of this new issue made me wonder... But speaking of timing: what else happened during the first week of December? Well, for one— that's when it got cold. Others are reporting that the clunking noice has intensified since winter has come. ALSO, unless I am mistaken, that's when we all got our over-the-air software update. It has been suggested elsewhere in this thread that there could be a software variable associated with the adaptive dampers at play. I'm living with it, but I'm pretty OCD and this is driving me kind of nuts. I had the car for six months and 14,000 miles before I noticed it. I would have noticed if there was a clunking noise before. I'll be monitoring this thread with great interest. Last edited by Jashue; 02-26-2023 at 12:36 PM.. Reason: Spelling
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01-14-2023, 12:31 AM	#158
Boxtyp3 Major 79 Rep 1,353 Posts Drives: 2015 F32 MG Join Date: Apr 2010 Location: SF Bay Area iTrader: (0) Garage List 2015 F32 435 [0.00] 2002 E46 cp [0.00] 2010 E82 135i [0.00] 2013 E92 335i [0.00]	Following...having the same issue. Noticed mine around a month after taking delivery (Oct. '22).
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01-17-2023, 10:25 PM	#159
Jabmwo Enlisted Member 66 Rep 41 Posts Drives: F22 230 Manual Join Date: Sep 2016 Location: North Carolina iTrader: (1)	hey guys, as I mentioned before my M240 has the same problem. Dealer confirmed and replaced the rear strut and strut base. Noise is still there but now they say is normal, that it's the exhaust in sport mode (my rear end). Does anyone have a video/recording of the sound? thanks
	Appreciate 1 Caerus534.50 Quote

01-19-2023, 11:28 AM	#161
Saturns Lieutenant 171 Rep 401 Posts Drives: G42,570GT,Lp5704STS,F36,F34 Join Date: Sep 2011 Location: Toronto iTrader: (0) Garage List 2023 BMW m240i [10.00] 17 Mclaren 570GT [9.50] 12 Lambo Supertrofe ... [0.00] 04 Lambo Gallardo ( ... [0.00] 08 Aston Martin Van ... [0.00]	I think I heard that very faint low sound you guys are mentioning about. Sporadic low thump rear passenger area. A low frequency thump like when something closes in a vacuum seal. Truthfully sounds to me like the valve in the right exhuast. In sport+ mode on slightly bumpy road when I feather the throttle on/off/on/off I can make the thump happen. At least for me seems like the exhuast valve. I'm presuming if one does the hack to fix the valve open all the time it won't do this sound. Anyone here that has exhuast flap held open and or change of exhuast have the thump issue?
	Appreciate 0 Quote

01-22-2023, 10:44 AM	#162
Jabmwo Enlisted Member 66 Rep 41 Posts Drives: F22 230 Manual Join Date: Sep 2016 Location: North Carolina iTrader: (1)	Hey Saturns, I think you are describing other problem, the cluncking/rattle in my M240 is independent of RPMs, it intensify according the condition on the road. You can coast in N and hear the rattle in a bumpy road.
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01-28-2023, 04:39 PM	#165
Bandit009 Lieutenant 357 Rep 408 Posts Drives: M240i xdrive Join Date: Jan 2023 Location: Florida iTrader: (0)	Dec. purchase of a 2023, with idrive 8, wheel and cooling package. Have the "thump". Passenger side by rear wheel. Haven't figured it out. Patiently waiting.
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01-29-2023, 05:03 PM	#166
BG42 Captain 404 Rep 602 Posts Drives: M240ix Join Date: Dec 2022 Location: ATL iTrader: (0)	Its been kind of cold here I noticed today it wasn't as noticeable coming back from Costco, maybe it was the extra weight maybe it was just stuff muffling it who knows.
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01-29-2023, 07:34 PM	#167
Halfisherman New Member 12 Rep 6 Posts Drives: BMW M240i xdrive Join Date: Jan 2023 Location: Boston iTrader: (0)	I have a 11/22 build G42 with the perf pkg and I am experiencing the thumping or rattle in the right rear. As many have mentioned it appears to be the suspension. I didn't notice at the of delivery with the package supplied 4s summer tires. I had the tires swapped in the first 300 miles with the 4s all season and have noticed the sound, car has around 1200 miles to date.
	Appreciate 0 Quote

02-02-2023, 12:19 PM	#168
harcos Private First Class 77 Rep 156 Posts Drives: 240i xdrive Join Date: Jan 2022 Location: belgique iTrader: (0)	I just saw a post about this on a German forum. To summarize : The guy dropped the car for this problem. According to the dealership's after-sales adviser, only vehicles with adaptive suspension are concerned and the subject is a priority at BMW. BMW gave instructions to replace the rear shock absorbers: he does not remember very well but it would be necessary to replace those which have the number which end in "1" (part identifier) by those which end in "2". He will have noticed a significant improvement but has yet to confirm it over the longer term.
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02-03-2023, 11:39 AM	#172
hooked Private First Class 191 Rep 127 Posts Drives: 2022 M240i xDrive Join Date: Mar 2019 Location: Massachusetts iTrader: (0)	Good intel from owners in Germany Great find harcos! Derwatt posted: In the case of vehicles from customers who have contacted their dealer about the noise, BMW has given instructions to replace the rear shock absorbers. The shock absorbers originally installed (i.e. during vehicle production) have an incorrect identifier which as far as I remember ends in "1" and would have to be replaced by ones with the correct ID ending in "2." My rear dampers were replaced in late Nov/early Dec but maybe with the wrong ones (the same parts ending in "1" it was built with)? This would also point to my dealer being incorrect (although they did say best guess) that there may be an EDC firmware update forthcoming. Later on in the thread Derwatt asked Rollerblader to provide his source for this statement: According to BMW, the "problem" in the vehicles from production Jan 2023 has been fixed. If true, these should be getting to customers now and if they are NOT exhibiting the noise, then we know BMW has implemented the fix and hopefully a bulletin will follow shortly thereafter. Stay tuned.
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02-03-2023, 12:07 PM	#173
harcos Private First Class 77 Rep 156 Posts Drives: 240i xdrive Join Date: Jan 2022 Location: belgique iTrader: (0)	To be careful and before declaring victory too quickly, you will probably have to wait a little to see if this is really the cause and the right solution (shock absorbers or EDC update). I don't know where it is possible to find this "final number". I don't know if mine is affected because it hasn't been driven yet, but I follow the problem regularly
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02-07-2023, 11:38 AM	#175
Tryboz Private First Class 54 Rep 104 Posts Drives: 2020 330 Join Date: May 2015 Location: Jacksonville, FL iTrader: (0)	Took my car for an oil change and explained the noise to my service tech. My appt was just for the oil so not alloted to diagnose the issue, just alerting them so BMW has more complaints on file. They do not have any tech bulletins that he could see. Just giving an update to the forum
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02-08-2023, 08:49 AM	#176
Value First Lieutenant 506 Rep 358 Posts Drives: M240i Join Date: Jan 2022 Location: New York iTrader: (0)	Very late to the party lol - I haven’t heard this thump since I installed coilovers. Ive had them installed for a few months now. I’m guessing it’s something to do with EDC and or the shocks. I installed Kw’s and deleted the EDC. Nobody else is running coilovers?? Shesssh.
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