Whining high pitched jet engine sound while braking...

ES_TRADER · 09-08-2014, 11:29 PM

So I test drove another m4 and while braking you get this odd whining noise that can be heard through the cabin when windows are rolled up.

Is this normal? Sounds like a jet engine winding down. I though it was the engine but as I kept stop and go braking even at parking lot speeds I could hear it...

Anyone experience this?

Normal brakes not ceramic

m4pewpew · 09-09-2014, 12:09 AM

If the noise you've described is the same as the following video (go to 6:15):

Then it's fine. Eventually it goes away.

parky1215 · 09-09-2014, 01:09 AM

Yea, it goes away after a while.

Paul O · 09-09-2014, 01:51 PM

Ive noticed it to sound like a loud fan.
Mostly present when in sport plus throttle setting. I think its the extra cooling on the radiators but goes away quite quickly after stopping at a light.
First i thought it was the turbos spinning down ( ball bearing turbos usually make this sound when spinning down).
If anyone knows what is causing this sound, id like to know..

thebishman · 09-09-2014, 02:25 PM

Normal sound of a car with a high performance braking system using floating rotors. Enjoy it as it means your M car finally has some worthy brakes.
Bish

babyboss · 09-09-2014, 05:06 PM

got same sound ..
bit irritating esp when u takin fans for a test drive <>

theomega · 09-09-2014, 05:13 PM

I noticed the same sound, and at 1100 miles it seems like its a lot more subtle now (or did I just get used to it?)

Curious to know what it is/was too. Is it really the brakes?

BuLoOoSki · 09-09-2014, 05:46 PM

I just took delivery of my car and noticed the same sound right after leaving the dealership. Good to know that it eventually goes away.

Jdebitjr · 09-09-2014, 07:21 PM

My F80 had it. Gone after 300ish miles.

r3dbimmer89 · 01-04-2015, 03:16 PM

Quote:

Originally Posted by ES_TRADER

So I test drove another m4 and while braking you get this odd whining noise that can be heard through the cabin when windows are rolled up.

Is this normal? Sounds like a jet engine winding down. I though it was the engine but as I kept stop and go braking even at parking lot speeds I could hear it...

Anyone experience this?

Normal brakes not ceramic

I got this sound too...it's not the same as in the video. It only happens when I back up with the wheel turned and the car warmed up...I think it has something to do with the parking brake.

09-08-2014, 11:29 PM	#1
ES_TRADER Colonel 344 Rep 2,928 Posts Drives: 328i, 335i, M3, 535i, X5, 36M Join Date: Oct 2010 Location: OC iTrader: (3) Garage List 2014 Ford Raptor [0.00] 2012 328i E92 [10.00] 2013 X5 [0.00] 2013 335i F30 [8.00] 1990 Toyota Previa [0.00] 1997 E36 M3 [10.00] 2011 E92 M3 [0.00] 2011 535i [0.00]	Whining high pitched jet engine sound while braking... So I test drove another m4 and while braking you get this odd whining noise that can be heard through the cabin when windows are rolled up. Is this normal? Sounds like a jet engine winding down. I though it was the engine but as I kept stop and go braking even at parking lot speeds I could hear it... Anyone experience this? Normal brakes not ceramic
	Appreciate 0 Tweet Quote

09-09-2014, 12:09 AM	#2
m4pewpew Second Lieutenant 64 Rep 256 Posts Drives: M4 Join Date: Jul 2014 Location: ATX iTrader: (0)	If the noise you've described is the same as the following video (go to 6:15): Then it's fine. Eventually it goes away. __________________ BMW M4: Mineral White. DCT. Exec Package. Optional 19". Full leather. 7/7/14: On the waiting list \| 9/8/14: Order submitted \| 10/2/14: Order approved. Production number received \| 11/7/14: In Production \| 11/15/14: End of production \| 11/21/14: En route to the US \| 12/7/14: Finishing touches \| 12/13/14: At the dealer \| 12/15/14: Car in garage
	Appreciate 0 Quote

09-09-2014, 01:09 AM	#3
parky1215 Lieutenant Colonel 561 Rep 1,978 Posts Drives: F90 M5C \| G06 X6 M60i Join Date: Nov 2010 Location: Rancho Cucamonga, CA iTrader: (13)	Yea, it goes away after a while.
	Appreciate 0 Quote

09-09-2014, 01:51 PM	#4
Paul O Private 9 Rep 80 Posts Drives: 2006 Carrera 4S 6MT Join Date: Dec 2011 Location: Brampton, ON iTrader: (2)	Ive noticed it to sound like a loud fan. Mostly present when in sport plus throttle setting. I think its the extra cooling on the radiators but goes away quite quickly after stopping at a light. First i thought it was the turbos spinning down ( ball bearing turbos usually make this sound when spinning down). If anyone knows what is causing this sound, id like to know.. __________________ 2009 E92 M3 DCT - Sold 2015 F80 M3 AW/ SO 6MT- Sold 2015 F82 M4 SSII DCT - Sold 2006 Carerra 4S 6MT 2020 M240i Xdrive
	Appreciate 0 Quote

09-09-2014, 02:25 PM	#5
thebishman Major 531 Rep 1,152 Posts Drives: ‘24 iX M60 Join Date: Sep 2012 Location: Overland Park, KS iTrader: (0)	Normal sound of a car with a high performance braking system using floating rotors. Enjoy it as it means your M car finally has some worthy brakes. Bish
	Appreciate 0 Quote

09-09-2014, 05:06 PM	#6
babyboss Lieutenant 74 Rep 554 Posts Drives: 640d Msport Join Date: Jun 2010 Location: centurion iTrader: (0) Garage List 2012 640d [0.00]	got same sound .. bit irritating esp when u takin fans for a test drive <>
	Appreciate 0 Quote

09-09-2014, 05:13 PM	#7
theomega Private First Class 10 Rep 106 Posts Drives: 2015 F82 M4 DCT Join Date: Apr 2014 Location: SF Bay Area iTrader: (0)	I noticed the same sound, and at 1100 miles it seems like its a lot more subtle now (or did I just get used to it?) Curious to know what it is/was too. Is it really the brakes?
	Appreciate 0 Quote

09-09-2014, 05:46 PM	#8
BuLoOoSki Colonel 749 Rep 2,108 Posts Drives: 2015 BMW M3 Join Date: Oct 2007 Location: Kuwait iTrader: (9)	I just took delivery of my car and noticed the same sound right after leaving the dealership. Good to know that it eventually goes away. __________________ 2015 BMW F80 M3: Tractive EDC Suspension / Dinan Anti-Roll Bars / GC Camber Plates / KMP Dual Diff Mount / Girodisc Rotors / GT4 Brake Cooling Kit / PTF Flash Tune / Eisenmann Downpipes / CSF Heat Exchanger / BMS Charge Pipes 2007 BMW E92 335i (SOLD): BMS JB4 / Quaife LSD / Riss Racing DPs / Helix Intercooler / BMS Intake / STETT Charge Pipe / Forge DVs
	Appreciate 0 Quote

09-09-2014, 07:21 PM	#9
Jdebitjr Lieutenant 8 Rep 408 Posts Drives: 2008 and 2015 M3 Sedans Join Date: Jan 2008 Location: DFW, Texas iTrader: (0)	My F80 had it. Gone after 300ish miles.
	Appreciate 0 Quote