M4 DCT Auto start/stop "Clunk"

Wills2 · 11-11-2016, 06:51 AM

After I listened for it that day, I haven't heard it since, you guys must have super hearing either that or mine's drowned out by the rattles and squeaks.

Dieselind · 11-14-2016, 04:58 AM

@TLA2319 have to agree with you - the sound resonates through the arm rest too!

bk_g80_m3 · 02-28-2017, 01:15 PM

Hey guys - I noticed this in my M2 today. Do we file this noise under "they all do that" or is this a problem that has a fix?

Here is a video, do your click clunk knock sound the same? Thanks!

gatsojon · 03-01-2017, 08:32 AM

Quote:

Originally Posted by fjork_duf

Hey guys - I noticed this in my M2 today. Do we file this noise under "they all do that" or is this a problem that has a fix?

Here is a video, do your click clunk knock sound the same? Thanks!

Mine does that or similar and so did the one I tested before buying. It didn't worry me then and I'm still not worried about it now. I hope never to worry about it...

pbw · 03-01-2017, 02:45 PM

mine does it too, i class it as 'a feature' and not worried by it. trick is to never stop!

bloke79 · 03-01-2017, 05:09 PM

Heh - just about to book my car in and had the same question - thanks for clarifying... Not entirely "glad" it's normal - because it's annoying, but at least it's not a problem.

Gio72 · 10-15-2018, 12:19 AM

Hi Guys!
I recover this discussion because my M4 seems to have that “clunk” noise increased throught time... At the beginning was a little noise, but now I’m a little bit worried about.
Any news about it?

Smee · 10-15-2018, 03:39 AM

is it me or does it sound like a Relay tripping?

t5pilot · 10-15-2018, 06:24 AM

Quote:

Originally Posted by Smee

is it me or does it sound like a Relay tripping?

Yes it does sound similar, it's an actuator. Mine's always done it. I have ASS coded out by default, but do turn it on if i'm stuck in stop/start traffic. As to how loud the 'clunk' is, this must vary. Mine's just noticeable. Nowhere near as loud as the one in the video clip above.

BoostinLI · 08-08-2019, 11:35 AM

If I may, just for any future readers, my 2016 does the same thing. The only way to get around it is to either of course turn it off by pressing the button or try to figure out when the light will change or the traffic will begin to move and take your foot off the brakes 30 seconds in advance. For some reason the rpms jump up to high and the car lurches/clunks because of that. It's annoying but that's what has worked for me.

Cheech666 · 08-27-2022, 04:27 PM

Quote:

Originally Posted by BoostinLI

If I may, just for any future readers, my 2016 does the same thing. The only way to get around it is to either of course turn it off by pressing the button or try to figure out when the light will change or the traffic will begin to move and take your foot off the brakes 30 seconds in advance. For some reason the rpms jump up to high and the car lurches/clunks because of that. It's annoying but that's what has worked for me.

Mine started doing it today and I hadnt noticed it before, weird. Anyone know how to get around it or diminish it?

MJBO · 08-27-2022, 04:37 PM

Quote:

Originally Posted by Smee

is it me or does it sound like a Relay tripping?

That’s how I’d describe it in mine, not as a clunky but more like a click.

I have start stop coded to remember the previous setting to have it off most of the time, and only use it when sitting in a lot of traffic (the silence is nice).

gateguardian · 02-28-2023, 08:04 AM

hey all - has a solution to this been found after so many years, or is it still a 'they all do that' issue

11-11-2016, 06:51 AM	#23
Wills2 Barge driver 8647 Rep 12,421 Posts Drives: 730d Join Date: Aug 2014 Location: UK iTrader: (0)	After I listened for it that day, I haven't heard it since, you guys must have super hearing either that or mine's drowned out by the rattles and squeaks. __________________ 730d/Z4C
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11-14-2016, 04:58 AM	#24
Dieselind New Member 21 Rep 22 Posts Drives: Late '16 M4 ZCP in SO Join Date: Oct 2016 Location: London iTrader: (0)	@TLA2319 have to agree with you - the sound resonates through the arm rest too! Last edited by Dieselind; 11-14-2016 at 04:59 AM.. Reason: forgot to reference a user
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02-28-2017, 01:15 PM	#25
bk_g80_m3 Second Lieutenant 190 Rep 285 Posts Drives: 2017 M2 Join Date: Dec 2007 Location: California iTrader: (0)	Hey guys - I noticed this in my M2 today. Do we file this noise under "they all do that" or is this a problem that has a fix? Here is a video, do your click clunk knock sound the same? Thanks!
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03-01-2017, 02:45 PM	#27
pbw First Lieutenant 248 Rep 371 Posts Drives: bmw 240i xdrive g42 Join Date: Jul 2012 Location: uk iTrader: (0) Garage List 2022 240i x-drive [0.00]	mine does it too, i class it as 'a feature' and not worried by it. trick is to never stop!
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03-01-2017, 05:09 PM	#28
bloke79 Private First Class 57 Rep 145 Posts Drives: 2017 BMW M4 Competition Join Date: Jul 2016 Location: Melbourne, Australia iTrader: (0)	Heh - just about to book my car in and had the same question - thanks for clarifying... Not entirely "glad" it's normal - because it's annoying, but at least it's not a problem.
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10-15-2018, 12:19 AM	#29
Gio72 Captain 55 Rep 681 Posts Drives: G80 M3 Competition Join Date: Sep 2009 Location: Italy-Venice iTrader: (0)	Hi Guys! I recover this discussion because my M4 seems to have that “clunk” noise increased throught time... At the beginning was a little noise, but now I’m a little bit worried about. Any news about it?
	Appreciate 0 Quote

10-15-2018, 03:39 AM	#30
Smee Colonel 505 Rep 2,152 Posts Drives: BMW M4 F83 Join Date: Aug 2016 Location: Norfolk iTrader: (0)	is it me or does it sound like a Relay tripping? __________________ Current: BMW M4 F83 - Mods : Pedal Covers, LCI Stereo facia Retrofit and Carbon Rear corner covers Old: F32 435d M Sport - Mods : HR Sport Springs, 20" Veemann V-FS23 in Gun Metal, M Performance Body Kit, Pedal Covers, Eurspec CF Mirror Caps, More-BHP remap 364 BHP 741 NM, M4 Under Chassis Brace, 15mm Rear ARB, 8.8" Screen Retrofit and LCI Stereo facia Retrofit
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08-08-2019, 11:35 AM	#32
BoostinLI Private First Class 29 Rep 128 Posts Drives: BMW m4 Join Date: Jul 2019 Location: New York iTrader: (0)	If I may, just for any future readers, my 2016 does the same thing. The only way to get around it is to either of course turn it off by pressing the button or try to figure out when the light will change or the traffic will begin to move and take your foot off the brakes 30 seconds in advance. For some reason the rpms jump up to high and the car lurches/clunks because of that. It's annoying but that's what has worked for me.
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02-28-2023, 08:04 AM	#35
gateguardian New Member 7 Rep 15 Posts Drives: E46 Join Date: May 2017 Location: S iTrader: (0)	hey all - has a solution to this been found after so many years, or is it still a 'they all do that' issue
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