M4 DCT Auto start/stop "Clunk"

Wills2 · 11-11-2016, 07:51 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, 05:58 AM

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

fjork_duf · 02-28-2017, 02:15 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, 09:32 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, 03:45 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, 06:09 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, 01:19 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, 04:39 AM

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

t5pilot · 10-15-2018, 07:24 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.

cesarlcase · 08-08-2019, 12:35 PM

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.

11-11-2016, 07:51 AM	#23
Wills2 Barge driver 5498 Rep 9,782 Posts Drives: G11 740d/X3M Join Date: Aug 2014 Location: West Yorkshire 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. __________________ G11 740d xdrive/X3M/Z4C, Gone F80 M3/F10 M5/F31 335d/e92 M3 x 2/F10 520d x 2/997 C2S/e46 M3/e46 320d/SL320/Touareg 3.2V6/Audi allroad 2.7TDi
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11-14-2016, 05:58 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 05:59 AM.. Reason: forgot to reference a user
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02-28-2017, 02:15 PM	#25
fjork_duf Second Lieutenant 133 Rep 259 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, 03:45 PM	#27
pbw Second Lieutenant 83 Rep 214 Posts Drives: bmw m4 aw/ss Join Date: Jul 2012 Location: uk iTrader: (0) Garage List 1998 Z3 2.2 [0.00] 2014 640i [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, 06:09 PM	#28
bloke79 Private 31 Rep 82 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. __________________ Currently Own 2017 BMW M4 Competition Pack - Mineral Grey. 2014 Audi S3 Sedan - Daytona Grey
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10-15-2018, 01:19 AM	#29
Gio72 Captain 39 Rep 659 Posts Drives: F82 M4 + MPE + Biesse Racing 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, 04:39 AM	#30
Smee Colonel 409 Rep 2,030 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, 12:35 PM	#32
cesarlcase Registered 0 Rep 4 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.
	Appreciate 0 Quote

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