Rattle under hard acceleration

Hirads · 03-14-2019, 12:06 AM

Hey all,
I get this weird rattle from under the car. Seems to be under the arm rest. It only happens under hard acceleration and if people are sitting in the back it makes it happen in less harder pulls as well. Car still under warranty and planning to go to BMW of Seattle to see what's up but wanted to know if anyone has the same issue. I drive 15 335. I've seen in other posts that some m3 have the same issue which apparently is the brake line tubing...
Any suggestions...

Mr. Tasty · 03-14-2019, 12:35 PM

I have this. I have torn apart the arm rest. I have reduced the issue to the ebrake cable. I found a source that suggested under hard acceleration, the e brake cable underneath the car is making contact with the driveshaft.

i have tested this by removing the back vents kn the center console and accelerating quickly. the cable has vibrations when this Is done. I need to get under the car eventually because it is excruciatingly annoying

Hirads · 03-14-2019, 02:19 PM

Quote:

Originally Posted by Mr. Tasty

I have this. I have torn apart the arm rest. I have reduced the issue to the ebrake cable. I found a source that suggested under hard acceleration, the e brake cable underneath the car is making contact with the driveshaft.

i have tested this by removing the back vents kn the center console and accelerating quickly. the cable has vibrations when this Is done. I need to get under the car eventually because it is excruciatingly annoying

Sounds like this?

Mine sounds exactly like this. Video is from a m3 but I'm sure the e brake tubing not gonna be any different

Mr. Tasty · 03-14-2019, 02:32 PM

Quote:

Originally Posted by Hirads

Quote:

Originally Posted by Mr. Tasty

I have this. I have torn apart the arm rest. I have reduced the issue to the ebrake cable. I found a source that suggested under hard acceleration, the e brake cable underneath the car is making contact with the driveshaft.

i have tested this by removing the back vents kn the center console and accelerating quickly. the cable has vibrations when this Is done. I need to get under the car eventually because it is excruciatingly annoying

Sounds like this?

Mine sounds exactly like this. Video is from a m3 but I'm sure the e brake tubing not gonna be any different

that's the noise

EDWYER · 03-18-2019, 10:05 AM

Yeah that would drive me nuts.

RuinedF30 · 03-18-2019, 01:04 PM

Just had this same issue as you resolved. Turns out it is a faulty e brake cable bracket. It's an $8 part but takes some labor to fix. Took me a month or so before I finally quit trying to diagnose problem myself and bring it to a professional shop. If you have any questions you can PM me.

Phyrexia · 02-08-2020, 11:15 AM

Quote:

Originally Posted by RuinedF30

Just had this same issue as you resolved. Turns out it is a faulty e brake cable bracket. It's an $8 part but takes some labor to fix. Took me a month or so before I finally quit trying to diagnose problem myself and bring it to a professional shop. If you have any questions you can PM me.

Fine sir, would you share this part number with us? I spent two hours last night chasing the rattle.

Mr. Tasty · 02-19-2020, 10:06 PM

Quote:

Originally Posted by Phyrexia

Fine sir, would you share this part number with us? I spent two hours last night chasing the rattle.

]
#12

Mr. Tasty · 02-19-2020, 10:08 PM

or #6 depending where it is located on the car.

spwickson · 10-07-2023, 09:48 AM

Thanks everyone, this has been annoying/scaring the s**t out of me that it was transmission or engine.

Will take to the garage to get fixed.

spwickson · 10-25-2023, 03:50 PM

Nailed it, cheers guys!!

2017 BMW 440i Gran Coupe with 58k

This sound has been bugging me for about a month, garage are repairing now.

03-14-2019, 12:06 AM	#1
Hirads Private 16 Rep 62 Posts Drives: 2015 335i M-Sport Join Date: Aug 2018 Location: PNW iTrader: (0)	Rattle under hard acceleration Hey all, I get this weird rattle from under the car. Seems to be under the arm rest. It only happens under hard acceleration and if people are sitting in the back it makes it happen in less harder pulls as well. Car still under warranty and planning to go to BMW of Seattle to see what's up but wanted to know if anyone has the same issue. I drive 15 335. I've seen in other posts that some m3 have the same issue which apparently is the brake line tubing... Any suggestions...
	Appreciate 2 akgambino271.50 Mr. Tasty427.50 Tweet Quote

03-14-2019, 12:35 PM	#2
Mr. Tasty Captain 428 Rep 707 Posts Drives: AW 335i Mperformance Join Date: Apr 2016 Location: Gilbert iTrader: (0)	I have this. I have torn apart the arm rest. I have reduced the issue to the ebrake cable. I found a source that suggested under hard acceleration, the e brake cable underneath the car is making contact with the driveshaft. i have tested this by removing the back vents kn the center console and accelerating quickly. the cable has vibrations when this Is done. I need to get under the car eventually because it is excruciatingly annoying
	Appreciate 0 Quote

03-18-2019, 10:05 AM	#5
EDWYER Yoda of mods 1672 Rep 3,004 Posts Drives: X5 RWD Join Date: Feb 2018 Location: NC iTrader: (40) Garage List 2015 X5 RWD [0.00] 2016 BMW M2 [10.00]	Yeah that would drive me nuts. __________________ Current: 2020 Explorer ST (Agate Black Metallic), F15 SGM RWD F87 AW (retired) F30 SBM 316rwhp/440rwtq (retired) Follow me on Twitter: https://twitter.com/EdwyerCLT YT: https://www.youtube.com/@DWYERGARAGE/videos
	Appreciate 0 Quote

02-19-2020, 10:08 PM	#9
Mr. Tasty Captain 428 Rep 707 Posts Drives: AW 335i Mperformance Join Date: Apr 2016 Location: Gilbert iTrader: (0)	or #6 depending where it is located on the car. Attached Images
	Appreciate 0 Quote

10-07-2023, 09:48 AM	#10
spwickson Registered 0 Rep 4 Posts Drives: 2017 440i Grand Coupe (F36) Join Date: Dec 2020 Location: Texas iTrader: (0)	Thanks everyone, this has been annoying/scaring the s**t out of me that it was transmission or engine. Will take to the garage to get fixed.
	Appreciate 0 Quote

03-18-2019, 01:04 PM	#6
RuinedF30 Enlisted Member 4 Rep 34 Posts Drives: 2014 335i A/T Join Date: Oct 2018 Location: Hurst, TX iTrader: (1)	Just had this same issue as you resolved. Turns out it is a faulty e brake cable bracket. It's an $8 part but takes some labor to fix. Took me a month or so before I finally quit trying to diagnose problem myself and bring it to a professional shop. If you have any questions you can PM me.
	Appreciate 1 Hirads16.00 Quote

10-25-2023, 03:50 PM	#11
spwickson Registered 0 Rep 4 Posts Drives: 2017 440i Grand Coupe (F36) Join Date: Dec 2020 Location: Texas iTrader: (0)	Nailed it, cheers guys!! 2017 BMW 440i Gran Coupe with 58k This sound has been bugging me for about a month, garage are repairing now.
	Appreciate 0 Quote