Strange Noise while accelerate at low rpm

Can335i · 05-27-2022, 12:19 AM

Hello maybe someone had the same problem

i have an M4 CP (06.20 with particulate filter) with 9,3k miles
when accelerate at low rpm theres a flutter noise under the engine/mid of the car

you can hear the noise if you drive next to a wall

https://youtube.com/shorts/rJ5d6p6HaiQ?feature=share

https://youtube.com/shorts/0XZXw6xDA1o?feature=share

Anyone have an idea?

hellokitty · 05-27-2022, 12:52 AM

Quote:

Originally Posted by Can335i

Hello maybe someone had the same problem

i have an M4 CP (06.20 with particulate filter) with 9,3k miles
when accelerate at low rpm theres a flutter noise under the engine/mid of the car

you can hear the noise if you drive next to a wall

https://youtube.com/shorts/rJ5d6p6HaiQ?feature=share

https://youtube.com/shorts/0XZXw6xDA1o?feature=share

Anyone have an idea?

Sounds like this…

https://f80.bimmerpost.com/forums/sh....php?t=1612812

Can335i · 05-27-2022, 07:32 AM

but my noise is always present
no difference between A/C on or off
and you can just hear it with windows open driving next to a wall

Sunny D · 05-30-2022, 10:01 AM

I have the exact same noise! Does yours go away as the car warms up? I brought mine in and the dealer found an exhaust leak from the gasket between the down pipe and the mid pipe. They did the work, and it got better, but it is not 100% gone. So I think they did not replace both gaskets that were required.

See here - https://f80.bimmerpost.com/forums/sh....php?t=1614897

Can335i · 05-31-2022, 05:36 AM

noise is always there, cold or warm engine
no difference
i will take the car to the dealer they should look under warranty

Sunny D · 05-31-2022, 06:44 AM

It could be the old hand break cable rattle. Have you see that?

Can335i · 05-31-2022, 08:24 AM

I‘ve seen that thread but never heard the noise which it would do.
But do you really think an 06/20 built would have the problem which is existing since 2015?

Sunny D · 05-31-2022, 08:37 AM

No idea. And I agree it’s weird. But worth checking out. As you’re under warranty, let me know what you find 👍

ZachEvans93 · 08-13-2022, 01:05 PM

Did you find out anything on this? Mine is making the same exact noise

bobbyf80 · 04-23-2023, 02:21 PM

I’m currently experiencing the same issue. Anyone know what it could be?

papasmurf_m3 · 04-24-2023, 01:23 AM

Exhaust leak?

F80 Andrew Jaco · 05-16-2023, 08:58 PM

Any updates on this?

Sunny D · 05-17-2023, 08:50 AM

So I am still dealing with this, cannot figure it out. Still think it is some type of exhaust leak. I had the gasket replaced by the dealer, and it was different, but then came back. So IDK. Probably just need to do the replacement myself to know for sure. Would love to hear if anyone else figured this out.

bobbyf80 · 05-19-2023, 01:50 PM

Turns out it was an exhaust leak, more specifically a cracked downpipe. I was using the ARM catless dp at the time so quality could be questionable but I replaced them with AA dp

papasmurf_m3 · 05-19-2023, 03:30 PM

Glad you it sorted. Was the crack on the weld?

bobbyf80 · 05-19-2023, 03:43 PM

It turned out to be a crack in the flex joint.

chewbakam4 · 05-19-2023, 05:48 PM

Glad you sorted it

Pewtinn · 06-29-2023, 11:12 PM

I'm having the exact same sound except im on stock DPs. Ugh I can hear it driving next to a wall so it's hard to pinpoint exactly where the sound is coming from.

jamo1997 · 04-16-2024, 12:20 AM

Quote:

Originally Posted by Can335i

Hello maybe someone had the same problem

i have an M4 CP (06.20 with particulate filter) with 9,3k miles
when accelerate at low rpm theres a flutter noise under the engine/mid of the car

you can hear the noise if you drive next to a wall

https://youtube.com/shorts/rJ5d6p6HaiQ?feature=share

https://youtube.com/shorts/0XZXw6xDA1o?feature=share

Anyone have an idea?

Did you manage to find the issue?
Currently got the same noise 🙄🤦
Thanks 👍🏼

Can335i · 04-18-2024, 05:31 PM

BMW said its coming from the turbos.
No need to worry and its normal. Frustrating but nothing you can do.

05-27-2022, 12:19 AM	#1
Can335i New Member 9 Rep 22 Posts Drives: M4 F82 Competition Join Date: Apr 2019 Location: Germany iTrader: (0)	Strange Noise while accelerate at low rpm Hello maybe someone had the same problem i have an M4 CP (06.20 with particulate filter) with 9,3k miles when accelerate at low rpm theres a flutter noise under the engine/mid of the car you can hear the noise if you drive next to a wall https://youtube.com/shorts/rJ5d6p6HaiQ?feature=share https://youtube.com/shorts/0XZXw6xDA1o?feature=share Anyone have an idea?
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05-27-2022, 07:32 AM	#3
Can335i New Member 9 Rep 22 Posts Drives: M4 F82 Competition Join Date: Apr 2019 Location: Germany iTrader: (0)	but my noise is always present no difference between A/C on or off and you can just hear it with windows open driving next to a wall Last edited by Can335i; 05-27-2022 at 07:40 AM..
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05-30-2022, 10:01 AM	#4
Sunny D Second Lieutenant 47 Rep 250 Posts Drives: 2017 F80 ZCP Join Date: Sep 2012 Location: ATL iTrader: (2)	I have the exact same noise! Does yours go away as the car warms up? I brought mine in and the dealer found an exhaust leak from the gasket between the down pipe and the mid pipe. They did the work, and it got better, but it is not 100% gone. So I think they did not replace both gaskets that were required. See here - https://f80.bimmerpost.com/forums/sh....php?t=1614897
	Appreciate 0 Quote

05-31-2022, 05:36 AM	#5
Can335i New Member 9 Rep 22 Posts Drives: M4 F82 Competition Join Date: Apr 2019 Location: Germany iTrader: (0)	noise is always there, cold or warm engine no difference i will take the car to the dealer they should look under warranty
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05-31-2022, 06:44 AM	#6
Sunny D Second Lieutenant 47 Rep 250 Posts Drives: 2017 F80 ZCP Join Date: Sep 2012 Location: ATL iTrader: (2)	It could be the old hand break cable rattle. Have you see that?
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05-31-2022, 08:24 AM	#7
Can335i New Member 9 Rep 22 Posts Drives: M4 F82 Competition Join Date: Apr 2019 Location: Germany iTrader: (0)	I‘ve seen that thread but never heard the noise which it would do. But do you really think an 06/20 built would have the problem which is existing since 2015?
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05-31-2022, 08:37 AM	#8
Sunny D Second Lieutenant 47 Rep 250 Posts Drives: 2017 F80 ZCP Join Date: Sep 2012 Location: ATL iTrader: (2)	No idea. And I agree it’s weird. But worth checking out. As you’re under warranty, let me know what you find 👍
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08-13-2022, 01:05 PM	#9
ZachEvans93 Registered 5 Rep 4 Posts Drives: 2018 BMW M4 Competition Join Date: Aug 2022 Location: Greenville, SC iTrader: (0)	Did you find out anything on this? Mine is making the same exact noise
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04-23-2023, 02:21 PM	#10
bobbyf80 New Member 8 Rep 7 Posts Drives: 2015 F80 M3 Tanzanite Blue Join Date: Nov 2022 Location: Indianapolis iTrader: (0) Garage List [0.00]	I’m currently experiencing the same issue. Anyone know what it could be?
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04-24-2023, 01:23 AM	#11
papasmurf_m3 Captain 455 Rep 844 Posts Drives: YMB F80 M3 Join Date: Apr 2019 Location: LA iTrader: (0)	Exhaust leak? __________________ 60-130 mph 6.72 secs 1/2 mile trap speed 158 mph ecutek - bend calibration pro tune - flex fuel - mpe - stock turbos - oem+
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05-16-2023, 08:58 PM	#12
F80 Andrew Jaco Enlisted Member 3 Rep 30 Posts Drives: 2018 BMW F80 M3 Comp Join Date: Nov 2022 Location: Thousand Oaks iTrader: (0)	Any updates on this?
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05-17-2023, 08:50 AM	#13
Sunny D Second Lieutenant 47 Rep 250 Posts Drives: 2017 F80 ZCP Join Date: Sep 2012 Location: ATL iTrader: (2)	So I am still dealing with this, cannot figure it out. Still think it is some type of exhaust leak. I had the gasket replaced by the dealer, and it was different, but then came back. So IDK. Probably just need to do the replacement myself to know for sure. Would love to hear if anyone else figured this out. __________________ Current - 2017 AW F80 ZCP Past - 2011 AW E90 M3 ZCP Past - 2011 AW E90 335i
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05-19-2023, 01:50 PM	#14
bobbyf80 New Member 8 Rep 7 Posts Drives: 2015 F80 M3 Tanzanite Blue Join Date: Nov 2022 Location: Indianapolis iTrader: (0) Garage List [0.00]	Issue resolved Turns out it was an exhaust leak, more specifically a cracked downpipe. I was using the ARM catless dp at the time so quality could be questionable but I replaced them with AA dp
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05-19-2023, 03:30 PM	#15
papasmurf_m3 Captain 455 Rep 844 Posts Drives: YMB F80 M3 Join Date: Apr 2019 Location: LA iTrader: (0)	Glad you it sorted. Was the crack on the weld? __________________ 60-130 mph 6.72 secs 1/2 mile trap speed 158 mph ecutek - bend calibration pro tune - flex fuel - mpe - stock turbos - oem+
	Appreciate 1 bobbyf807.50 Quote

05-19-2023, 03:43 PM	#16
bobbyf80 New Member 8 Rep 7 Posts Drives: 2015 F80 M3 Tanzanite Blue Join Date: Nov 2022 Location: Indianapolis iTrader: (0) Garage List [0.00]	It turned out to be a crack in the flex joint.
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05-19-2023, 05:48 PM	#17
chewbakam4 Major 717 Rep 1,184 Posts Drives: F82 M4 Join Date: Oct 2015 Location: Malton iTrader: (0)	Glad you sorted it
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06-29-2023, 11:12 PM	#18
Pewtinn First Lieutenant 108 Rep 340 Posts Drives: 2018 M3 Join Date: Jan 2021 Location: New York, NY iTrader: (0)	I'm having the exact same sound except im on stock DPs. Ugh I can hear it driving next to a wall so it's hard to pinpoint exactly where the sound is coming from.
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04-18-2024, 05:31 PM	#20
Can335i New Member 9 Rep 22 Posts Drives: M4 F82 Competition Join Date: Apr 2019 Location: Germany iTrader: (0)	BMW said its coming from the turbos. No need to worry and its normal. Frustrating but nothing you can do.
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