Bimmerpost
3
/
4 Series
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
Technical Topics Suspension / Chassis / Brakes M340i front left suspension clunk - 8/26 UPDATE

Post Reply
 
Thread Tools Search this Thread
      06-16-2020, 11:28 AM   #1
Bud Webber
Enlisted Member
36
Rep
46
Posts

Drives: M340i xDrive
Join Date: Jun 2019
Location: USA

iTrader: (0)

M340i front left suspension clunk - 8/26 UPDATE

On my ‘20 M340 with adaptive suspension, I sometimes hear a “clunking” noise when slowly driving over a speed bump.

The dealer put it on a rack and said nothing appears loose.

When the noise occurs, I not only hear the clunk but feel a slight vibration through the steering wheel.

Has anyone else heard a noise like this in their car?
Appreciate 0
      06-23-2020, 04:23 AM   #2
HSE0504
Registered
0
Rep
1
Posts

Drives: G20 320i
Join Date: May 2020
Location: Hong Kong

iTrader: (0)

Same here with my ‘19 320i without adaptive suspension. Clunking noise appears when starting the car every morning and slowly driving a speed bump or on a bumpy road. Went to the dealer a month ago and had both of the front wishbones replaced however the clunking noise comes back on the second day after replacement. Have to schedule another time slot to the dealer and get this fixed again.
Appreciate 0
      07-03-2020, 04:27 PM   #3
BlackM340
Registered
0
Rep
4
Posts

Drives: 2020 BMW M340
Join Date: Jul 2020
Location: New York

iTrader: (0)

Angry

I've been having the same issue, dealership says they can't replicate the issue. It got even worse with the increase in outdoor temperature.
Appreciate 0
      07-03-2020, 10:40 PM   #4
oln08
Private First Class
United_States
82
Rep
140
Posts

Drives: '19 M2
Join Date: Aug 2009
Location: California

iTrader: (1)

Quote:
Originally Posted by BlackM340 View Post
I've been having the same issue, dealership says they can't replicate the issue. It got even worse with the increase in outdoor temperature.
See the threads below, if you guys are having the same knock, then it's your steering gear. I had this on my F30. BMW actually had a fix for this that they sold for about $30.
It also happens mostly on lowered F8X cars too. I currently have this, although mild, on my M2. Thankfully my G20 is quiet.

https://f30.bimmerpost.com/forums/sh....php?t=1149998

https://f80.bimmerpost.com/forums/sh...057&page=3
Appreciate 0
      07-21-2020, 12:21 PM   #5
CrownRoyal79
Lieutenant
CrownRoyal79's Avatar
United_States
283
Rep
402
Posts

Drives: BMW 435i
Join Date: Mar 2019
Location: VA

iTrader: (0)

I have the "clunk" too. Left front, very noticeable on a cold start when stopping and accelerating at stop signs. As the weight shifts to/from the front-end, I can hear and feel the clunk. But it also happens at other times, during normal driving.

Surprisingly, it doesn't happen when going over speed bumps. I'm debating on whether I should take it in now or wait until the next scheduled oil change in a couple of months.
Appreciate 0
      07-21-2020, 02:10 PM   #6
del82
Second Lieutenant
102
Rep
250
Posts

Drives: BMW M340i xdrive
Join Date: Dec 2019
Location: UK

iTrader: (0)

Touch wood I don't have this but I did have it on my F20 (M140i). And I wasn't the only one. Sounds very familiar.

The comment about the F30 reminded me that we looked at all sorts on babybmw forum.

Came down to either new steering rack, top mount or a loose bolt on the steering rack. Info below: BMW eventually brought out a fix for the steering rack.

Impacted both left or right sides.

For me, initially the steering rack bolt was loose. Had it tightened, steering improved and noise was quieter but not gone.

Then my top mount exploded at 70mph on the motorway. Managed to get her to a BMW dealer nearby. They fixed under warranty and no noise ever again so was defo the top mount. Ironically I had taken her in 2 days before for them to check it. BMW said it's fine.


https://www.babybmw.net/forum/viewto...4&t=110735
__________________
Current: 2020 M340i
Past: M140i, Z4 35is
Appreciate 0
      07-21-2020, 04:32 PM   #7
Don76
Second Lieutenant
169
Rep
258
Posts

Drives: BMW 320i M-Sport
Join Date: Apr 2020
Location: Scotland

iTrader: (0)

I have this too. 2020 320i.
I've replaced the OE springs with H&R so assumed it was down to this.

Guess I can't exactly take it to the dealer for a fix given I've messed with the springs!?
Appreciate 0
      08-26-2020, 10:07 PM   #8
Bud Webber
Enlisted Member
36
Rep
46
Posts

Drives: M340i xDrive
Join Date: Jun 2019
Location: USA

iTrader: (0)

UPDATE:

My dealer discovered today that BMW issued service bulletin SIB 34-06-20 in June to address the complaint that "noise from the dynamic stability Dynamic Stability Control (DSC) can be heard when driving rapidly over speed bumps."

The bulletin instructs dealers to update the DSC Control (CTRL) program on x-drive G20 vehicles produced between October 2018 & June 2019. Mine was produced outside those dates, but apparently the dealer believes it may may correct the problem in my car, too.

My guess is that BMW may have revised the original DSC programming so that driving over speed bumps will no longer trigger the DSC and create a slight knocking sensation that can be felt up through the steering column.

To be clear, my car only made the noise intermittently when driving slowly over speed bumps, so time will tell if the revised programming works.
Appreciate 1
      09-27-2020, 10:12 AM   #9
ddaze
New Member
3
Rep
9
Posts

Drives: M340i
Join Date: Dec 2019
Location: USA

iTrader: (0)

January 2020 M340i with adaptive M suspension: I've got the clunk but dealer says they can't replicate...

Last edited by ddaze; 09-28-2020 at 10:40 AM..
Appreciate 0
      09-28-2020, 05:43 AM   #10
Booster
Pave The Rainforest
269
Rep
1,197
Posts

Drives: Wagon
Join Date: Dec 2005
Location: Norfolk, VA

iTrader: (33)

Garage List
2007 335i Coupe  [0.00]
This might be affecting some of you...
Attached Images
 
__________________
Sold: 2015 Pyrite Brown M3
Sold: 2020 Sunset Orange M340i Xdrive
Sold: 2021 Bluestone 540i Xdrive Msport
Appreciate 0
      12-11-2020, 03:56 PM   #11
gannys
New Member
0
Rep
5
Posts

Drives: BMW 330i
Join Date: Dec 2020
Location: Miami, FL

iTrader: (0)

Had the same issue two days ago and I don't have the adaptive suspension. Brought the car to the dealer and they said it was the strut. Now I have to wait for 3-5 weeks for the new strut to come.
Appreciate 0
      12-12-2020, 12:05 AM   #12
Mr.G20 M340
Captain
Mr.G20 M340's Avatar
United_States
221
Rep
769
Posts

Drives: 2020 Portimao Blue M340-x
Join Date: Dec 2013
Location: Los Angeles, CA

iTrader: (0)

I have adaptive suspension and I lowered my car and it just recently started making this noise, should I take the suspension off and take it to the dealership? I feel like theyd blame it on my suspension and void warranty.
It doesn't bother me that much, but I'm just worried it might be affecting something that I'm not aware of.
__________________
Instagram: Bmw_Captivate

2020 Portimao Blue M340 X Drive and adaptive suspension.
Mods: custom exhaust, VRSF Catted DP, Injen intake and Chargepipe.
Appreciate 0
      01-18-2021, 12:03 PM   #13
ruczko
Private First Class
Canada
97
Rep
195
Posts

Drives: '20 330xi
Join Date: Sep 2013
Location: Vancouver, BC

iTrader: (0)

I've got a 330 and having a similar issue with knocking... car is lowered on HR springs and I'm equally concerned that they will void my suspension warranty. Has anyone had success getting this fixed while being lowered?
Appreciate 0
      01-24-2021, 07:41 AM   #14
Jerrytarg6_m340
Second Lieutenant
Jerrytarg6_m340's Avatar
United_States
242
Rep
287
Posts

Drives: 2023 bmw m3 comp xdrive
Join Date: Oct 2020
Location: Totowa nj

iTrader: (0)

Garage List
Quote:
Originally Posted by Mr.G20 M340 View Post
I have adaptive suspension and I lowered my car and it just recently started making this noise, should I take the suspension off and take it to the dealership? I feel like theyd blame it on my suspension and void warranty.
It doesn't bother me that much, but I'm just worried it might be affecting something that I'm not aware of.
What did you end up doing. Did you take off or just bring it in. Is the problem fixed
Appreciate 0
      01-24-2021, 09:02 AM   #15
Amos91
Private First Class
93
Rep
156
Posts

Drives: G20 320d
Join Date: Jun 2020
Location: UK

iTrader: (0)

You'd be mental to go into BMW for a warranty suspension claim with lowering springs fitted.
Appreciate 0
      01-31-2021, 10:58 AM   #16
explosive0
Private
16
Rep
65
Posts

Drives: 528i
Join Date: Aug 2015
Location: Houston

iTrader: (1)

Quote:
Originally Posted by Amos91 View Post
You'd be mental to go into BMW for a warranty suspension claim with lowering springs fitted.
Was just about to post this.
Appreciate 0
      05-18-2021, 10:09 AM   #17
MikeyLFC
Registered
0
Rep
1
Posts

Drives: BMW 320d
Join Date: May 2021
Location: Liverpool, England

iTrader: (0)

Thumbs up

I made an account just to post this but thanks for making me realise I'm not going crazy and making it up.

I've took my 2018 320d into BMW 3 times and mentioned this clunk and been told each time that the car is fine, they can't replicate the clunk and that it's "a characteristic of the car".

It didn't always do it so I know something isn't right and like someone else said, it's happening more now it's warmer outside. I feel the clunk when I'm braking or accelerating (especially when stop/start kicks in) but also sometimes when I'm steering, not so much over speedbumps.

I'm not a massive car person and I'm a bit stumped with what to do next if BMW literally won't help me? My warranty is up in September so I want to get it sorted before then if it's something that is covered.
Appreciate 0
      06-01-2021, 06:06 PM   #18
SuprBmwG20
Private
21
Rep
63
Posts

Drives: Bmw G20 M340i
Join Date: Jun 2020
Location: Los Angeles

iTrader: (0)

Quote:
Originally Posted by Bud Webber View Post
On my ‘20 M340 with adaptive suspension, I sometimes hear a “clunking” noise when slowly driving over a speed bump.

The dealer put it on a rack and said nothing appears loose.

When the noise occurs, I not only hear the clunk but feel a slight vibration through the steering wheel.

Has anyone else heard a noise like this in their car?
Im also having the same issue with my M340i with adaptive suspension. Took it to the dealership and replaced the front upper guide support. However this did not fix the issue. If anyone has any recommendations to what it can be that would be great. The noise is coming from the front passenger side and I can feel a very slight vibration on each thump/click noise.
Appreciate 0
      06-13-2021, 09:03 AM   #19
dwj6211
Private First Class
76
Rep
178
Posts

Drives: 4 Series
Join Date: Apr 2018
Location: NYC

iTrader: (0)

Having a similar issue on my 2021 M440i. Here is my best attempt at recording the noise that's coming from the left front. Is this similar to what you all are also experiencing?

Any insight would be helpful! Have a service appointment in 2 weeks, that was the first appointment they had with a loaner vehicle available.

Appreciate 0
      06-18-2021, 12:50 PM   #20
CinnamonRage
Private
17
Rep
58
Posts

Drives: BMW M340i xDrive
Join Date: May 2016
Location: Scotland

iTrader: (0)

I’ve just started hearing this as well. It feels like front right same side as steering (I’m right hand drive - UK). It’s only over tiny bumps I hear it. I do have adaptive suspension.

I’m about a 7hr drive from home. I suspect it’ll be ok until then? It’s not a stop moving the car type thing, is it?
Appreciate 0
      06-21-2021, 11:38 PM   #21
CeriusM
Private
11
Rep
62
Posts

Drives: 2021 PMB BMW 330ix M
Join Date: Nov 2020
Location: MD

iTrader: (0)

I have a 2021 G20 330i M Sport with AS and I just started hearing it about 8k miles in from a brand new car. Going to the dealership on Thursday to see what they say. It clunks the most when you are turning and going over a small bump. It makes me feel like I'm driving a new york taxicab....so not cool.

...on an unrelated note: my car ALSO pulls to the left. This car doesn't seem to want to go straight on the highway. It's very busy to stay tracked.
Appreciate 0
      06-28-2021, 04:27 AM   #22
sirelliot
Registered
0
Rep
2
Posts

Drives: BMW MINI
Join Date: Jun 2021
Location: United Kingdom

iTrader: (0)

My October 2019 G20M340i had the same issue - (started knocking April/May 2021). Mileage was 11,000 miles and the knock came from front left side and low down (sounded the same as your video clip - a very distinctive knock!). Didn't do it on a regular basis; eventually after a spirited drive - the car was 'hot' - on returning home after 2 hours of continuous driving it knocked consistently every couple of hundred yards. My dash cameras picked up the sound and this allowed my local BMW service department to hear the noise. Dealer couldn't replicate but asked me for the dashcam MP4 files which were sent to BMW UK. Within 24 hours BMW UK responded with "change the steering rack". This was completed last week (24th June 2021) and so far after 200/250 miles the knock has gone!

Reference the video clip from dwj6211 posted 13th June2021

Last edited by sirelliot; 06-28-2021 at 04:33 AM..
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 07:22 AM.




g20
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST