This noise is driving me Crazy. Any ideas?

dezzracer · 02-17-2021, 03:12 PM

So I have what can best be described as a noise in my M3 CS that sounds like a quarter or a small bolt sliding back-and-forth in my driver side lower door cubby. When I brake I hear it and when I accelerate I hear it. Back-and-forth. Back and forth. It's driving me nuts.

I've checked every possible nook and cranny several times including under the driver seat and in the seat adjustment tracks with a flashlight for errant coins. Any ideas? Thanks in advance.

hoppes-no9 · 02-17-2021, 03:20 PM

It's probably a quarter in you driver's door cubby. Or maybe a small bolt.

😂

dezzracer · 02-17-2021, 03:43 PM

Quote:

Originally Posted by hoppes-no9

It's probably a quarter in you driver's door cubby. Or maybe a small bolt.

😂

It has to be right. Which is why I've checked for that like 20 times. Lol.

arashir · 02-17-2021, 03:47 PM

try checking the seat rails for foreign object

deeldoo · 02-17-2021, 04:03 PM

rock got in between your exhaust and heatshield.

Lift the car and pull it apart

dezzracer · 02-19-2021, 02:03 AM

Quote:

Originally Posted by arashir

try checking the seat rails for foreign object

If you mean the seat tracks that are bolted to the floor I've looked several times with a flashlight. Nothing

:

dezzracer · 02-19-2021, 02:04 AM

Quote:

Originally Posted by deeldoo

rock got in between your exhaust and heatshield.

Lift the car and pull it apart

Ok thanks, I'll check that.

mikey914 · 02-19-2021, 05:12 AM

i had a similar noise coming from my rear end, it turned out to be my rear differential was going bad, BMW just replaced my rear diff. metal clunking noise only when i tap the gas and let go completely and tap the gas again like you explained, but your noise is from the door? so not sure

dezzracer · 02-21-2021, 06:14 PM

Quote:

Originally Posted by mikey914

i had a similar noise coming from my rear end, it turned out to be my rear differential was going bad, BMW just replaced my rear diff. metal clunking noise only when i tap the gas and let go completely and tap the gas again like you explained, but your noise is from the door? so not sure

No mine is definitely up front near the cabin and it's something sliding back-and-forth when I brake or accelerate. Just can't find what the hell it is.

Suds · 02-21-2021, 06:17 PM

My then young son dropped a 1/2” diameter ball bearing from a game into the flooring of our Volvo XC90, I know how frustrating that noise can be.

alcook · 02-22-2021, 07:25 AM

Had something similar a year ago. I used a telescopic rod with a magnet on the end (it's a torch at the other) and I ran it around the seat and up and down the rails... voila!

A small nut from something had got into the rails and was simply not visible. Not much use on anything non-magnetic.. But this worked for me.

It's saved me a couple of more times too finding a dropped nut or washer...

I'm UK, but you get the idea. Literally a couple of bucks for you guys...

https://www.amazon.co.uk/Amtech-S223...17947260&psc=1

texasbarako · 03-04-2021, 11:17 PM

@dezzracer, were you able to get rid of the noise? I have exactly the same issue you posted...super annoying!

VroomBahpop · 03-05-2021, 06:04 PM

just hold the car upside down and shake it lol

deeldoo · 03-05-2021, 06:22 PM

Quote:

Originally Posted by VroomBahpop

just hold the car upside down and shake it lol

This.

My car has had every single buzz, shake, rattle, and noise in existence.

The F8X is the absolute most random car ever for this kind of shit

unfoundnemo · 03-06-2021, 09:29 AM

Quote:

Originally Posted by deeldoo

rock got in between your exhaust and heatshield.

Lift the car and pull it apart

While it's up there, might as well swap out the exhaust and throw on some downpipes right quick.

Whenever I mention a rattle in one of my cars, the service manager reminds me of a knob on the center console. Turn it clockwise far enough and all the rattles go away.

Seriously, though, is a great thread for the F80, though, not sure if this would cover your issue, but worth a glance: https://f80.bimmerpost.com/forums/sh....php?t=1031768

texasbarako · 03-06-2021, 11:01 AM

Just got out of the dealership for my brake fluid flush and mentioned some strange noise inside, you will not believe what they found!

Glue stick, pencil and quarters tucked inside the AC vent underneath the seats!!!

BzsBimmer · 03-06-2021, 12:40 PM

^ I was going to suggest checking the vents under the seat. With the resonance, it may sound like it’s coming from the door.

Worse case, you might also need to pull your door panel and check behind in the door.

Jim B · 03-06-2021, 10:30 PM

Quote:

Originally Posted by hoppes-no9

It's probably a quarter in you driver's door cubby. Or maybe a small bolt.

😂

...or maybe a loose nut!

HMM · 03-07-2021, 06:16 PM

I pulled a piece of sound deadening sheet from my head liner. It fell down and was sliding around, clunking as it hit each side. Took us a while to chase it down but we finally got it out.

02-17-2021, 03:12 PM	#1
dezzracer Major 1183 Rep 1,216 Posts Drives: 2018 M3 CS Join Date: Dec 2018 Location: The Great Mojave Desert iTrader: (0)	This noise is driving me Crazy. Any ideas? So I have what can best be described as a noise in my M3 CS that sounds like a quarter or a small bolt sliding back-and-forth in my driver side lower door cubby. When I brake I hear it and when I accelerate I hear it. Back-and-forth. Back and forth. It's driving me nuts. I've checked every possible nook and cranny several times including under the driver seat and in the seat adjustment tracks with a flashlight for errant coins. Any ideas? Thanks in advance.
	Appreciate 0 Tweet Quote

02-17-2021, 03:20 PM	#2
hoppes-no9 Private 60 Rep 87 Posts Drives: '18 F80 ZCP 6MT Join Date: Sep 2018 Location: Maryland iTrader: (0)	It's probably a quarter in you driver's door cubby. Or maybe a small bolt. 😂
	Appreciate 4 Rkt4852.00 agentrnge379.00 sna66507.50 Kilabyte3948.00 Quote

02-17-2021, 03:47 PM	#4
arashir Private First Class 164 Rep 164 Posts Drives: F82 Join Date: May 2017 Location: USA iTrader: (1)	try checking the seat rails for foreign object
	Appreciate 0 Quote

02-17-2021, 04:03 PM	#5
deeldoo Captain 1122 Rep 845 Posts Drives: BMW M4 - DCT 2016 Join Date: Nov 2019 Location: Toronto iTrader: (0)	rock got in between your exhaust and heatshield. Lift the car and pull it apart
	Appreciate 0 Quote

02-19-2021, 05:12 AM	#8
mikey914 Private First Class 120 Rep 146 Posts Drives: 2017 F80 M3 Join Date: Jan 2021 Location: NYC iTrader: (0)	i had a similar noise coming from my rear end, it turned out to be my rear differential was going bad, BMW just replaced my rear diff. metal clunking noise only when i tap the gas and let go completely and tap the gas again like you explained, but your noise is from the door? so not sure
	Appreciate 0 Quote

02-21-2021, 06:17 PM	#10
Suds /M Enthusiast 1597 Rep 1,618 Posts Drives: Responsiblish Join Date: Aug 2010 Location: Lone Star State iTrader: (1)	My then young son dropped a 1/2” diameter ball bearing from a game into the flooring of our Volvo XC90, I know how frustrating that noise can be. __________________ 2019 M2 Comp, Alpine White, DCT, track car build, 1/2 cage, AP Racing Brakes & Nitron Coilovers, BM3 Stage 1 93 Oct. 2018 Porsche Cayman GTS, Night Blue Metalic, PDK, COBB tuned 93 Oct. 2004 Audi A4 Avant USP 6mt, RS4 clutch, built motor, Garrett GT3071r "Big Ass Turbo" Motoza Tune
	Appreciate 0 Quote

02-22-2021, 07:25 AM	#11
alcook Captain 22 Rep 639 Posts Drives: M4 CP Convertible Join Date: Jun 2008 Location: Yorkshire, UK iTrader: (0)	Had something similar a year ago. I used a telescopic rod with a magnet on the end (it's a torch at the other) and I ran it around the seat and up and down the rails... voila! A small nut from something had got into the rails and was simply not visible. Not much use on anything non-magnetic.. But this worked for me. It's saved me a couple of more times too finding a dropped nut or washer... I'm UK, but you get the idea. Literally a couple of bucks for you guys... https://www.amazon.co.uk/Amtech-S223...17947260&psc=1
	Appreciate 0 Quote

03-04-2021, 11:17 PM	#12
texasbarako Registered 2 Rep 3 Posts Drives: BMW M4 Join Date: Mar 2021 Location: Texas iTrader: (0)	@dezzracer, were you able to get rid of the noise? I have exactly the same issue you posted...super annoying!
	Appreciate 0 Quote

03-05-2021, 06:04 PM	#13
VroomBahpop Private 28 Rep 90 Posts Drives: 2016 BMW M4 F82 Join Date: Aug 2020 Location: California iTrader: (0)	just hold the car upside down and shake it lol __________________ A floored M DCT shifting is one of the most Beautiful sounds I have ever heard.... Previous: 1999 Prelude SH, 2002 C5 Corvette, 2017 Civic Si, 2010 Tundra, too many motorcycles to list and too dangerous, The M4 is my bike riding on fours
	Appreciate 2 deeldoo1122.00 unfoundnemo1907.50 Quote

03-06-2021, 11:01 AM	#16
texasbarako Registered 2 Rep 3 Posts Drives: BMW M4 Join Date: Mar 2021 Location: Texas iTrader: (0)	Just got out of the dealership for my brake fluid flush and mentioned some strange noise inside, you will not believe what they found! Glue stick, pencil and quarters tucked inside the AC vent underneath the seats!!!
	Appreciate 1 irunalot1518.00 Quote

03-06-2021, 12:40 PM	#17
BzsBimmer Major General 3267 Rep 6,722 Posts Drives: '23 G80 FO M3, M3 & MY Tezzy's Join Date: Mar 2006 Location: Nor. Cal iTrader: (32)	^ I was going to suggest checking the vents under the seat. With the resonance, it may sound like it’s coming from the door. Worse case, you might also need to pull your door panel and check behind in the door.
	Appreciate 0 Quote

03-07-2021, 06:16 PM	#19
HMM Private 36 Rep 90 Posts Drives: 2018 M3 Join Date: Jun 2018 Location: TN iTrader: (0)	I pulled a piece of sound deadening sheet from my head liner. It fell down and was sliding around, clunking as it hit each side. Took us a while to chase it down but we finally got it out.
	Appreciate 0 Quote