Rear Humming Noise

bennye90 · 08-01-2017, 08:21 AM

2007 328xi

Rear humming noise on the driver side. Hum is persistent at speeds of 80-120km/h (50-75mph) when gaining speed or coasting. Noise disappears at any speed outside of that range (above/below). I also have slow leaking tires in the rear which will be replaced within the week.

Humming noise doesn't sound like grinding/metal/screeching. Noise is subtle and can only be heard on silent drives.

Any input on what it might be?

cristispot · 08-01-2017, 08:42 AM

hello bennye90,

don't throw rocks in me since it's my first post here, but still:

- could be bearing noise?
- since yours is xi , could be any differential problems?
- faulty tires or unbalanced wheels?

bennye90 · 08-01-2017, 08:59 AM

Quote:

Originally Posted by cristispot

hello bennye90,

don't throw rocks in me since it's my first post here, but still:

- could be bearing noise?
- since yours is xi , could be any differential problems?
- faulty tires or unbalanced wheels?

Welcome to the forums!!

Thanks for your input, the last thing I am hoping for is a differential problem. I suspect it to be one of these in escalating factor

random occurence > tires > balance/alignment > struts > bearings > unknown random problem > differential fluid > diff replacement

cristispot · 08-01-2017, 11:15 AM

it could be the bearing of one of the wheels.

i'm saying this because i experience the same problem with humming, like vum vum vum (lol) at around 60-70 km/h and goes away at speeds below/above one mentioned.

my mechanic told me that i shouldn't worry about it, worst case scenario will be that the wheel will get stuck while driving, but that will imply that the noise gets too loud to stand it while driving before this will happen.

anyhow, maybe other user can come up with any other ideas.

cheers!

bennye90 · 08-02-2017, 06:04 AM

Back from a 70km commute to home and back to work. Just throwing some confirmation info:

- same humming sound is still persistent at 80-120km/h
- confirmed again speeds outside the range makes no noise
- used DS manual mode and confirmed it is not dependent on RPMs, downshift and revup to higher rpm with still the same humming sound
- speed seems to be a the dependent with the most noticeable hum reaching 120

Still would like to get others input on this

Thanks!

jt335i · 08-02-2017, 07:36 AM

If you have a video or sound clip of this noise, it could help us diagnose the humming.

mistertml · 01-03-2018, 05:52 AM

I have the same issue with my car at present.
The humming is evident whilst I drive and stops when stationary.
I have had my tyres replaced and wheels balanced and tracking done.

I'm assuming bearings will need replacing.

Just wondering if you managed to sort your issue?

mistertml · 01-10-2018, 07:55 AM

Quote:

Originally Posted by mistertml

I have the same issue with my car at present.
The humming is evident whilst I drive and stops when stationary.
I have had my tyres replaced and wheels balanced and tracking done.

I'm assuming bearings will need replacing.

Just wondering if you managed to sort your issue?

My Issue was linked to rear driver side wheel bearing which has got rid of the hum.

Thanks

jmsent · 01-11-2018, 05:57 PM

I had this with my 335i. Bad wheel bearing.

gT-BMW · 01-11-2018, 06:13 PM

i wonder what the OP hummings sounds like.

OlliD · 01-12-2018, 07:56 AM

currently, I have the same issue.

- installed new and balanced winter tires, does not help.

Noise is present no matter what gear / rpm (but starts @ 80km/h til 120 km/h)
When turing left/right, noise stays the same.

immediately stops when going slower than 80 km or above 120

hue90 · 11-10-2022, 05:06 PM

Currently having this exact humming issue starting at 80km/h. Have you found the problem/fix?

lomon98 · Yesterday, 02:56 PM

Hi,

I also get something like what it has been described here coming from the rear axle or back of the car (short audio clip). I get it at around 35-40 mph (so 55- 65 kmh). It seems it is linked to velocity and nor rpms but I am not 100% convinced just yet.

Can anyone tell me what is the cause of this noise? Wheel bearing as well?

Many thanks!

08-01-2017, 08:21 AM	#1
bennye90 Private First Class 43 Rep 108 Posts Drives: E90 328xi Join Date: Mar 2017 Location: Toronto iTrader: (0)	Rear Humming Noise 2007 328xi Rear humming noise on the driver side. Hum is persistent at speeds of 80-120km/h (50-75mph) when gaining speed or coasting. Noise disappears at any speed outside of that range (above/below). I also have slow leaking tires in the rear which will be replaced within the week. Humming noise doesn't sound like grinding/metal/screeching. Noise is subtle and can only be heard on silent drives. Any input on what it might be?
	Appreciate 0 Tweet Quote

08-01-2017, 08:42 AM	#2
cristispot New Member 3 Rep 7 Posts Drives: 318D / E90 / Sedan Join Date: Aug 2017 Location: Bucharest, Romania iTrader: (0)	hello bennye90, don't throw rocks in me since it's my first post here, but still: - could be bearing noise? - since yours is xi , could be any differential problems? - faulty tires or unbalanced wheels?
	Appreciate 2 bennye9042.50 racermp191.50 Quote

08-01-2017, 11:15 AM	#4
cristispot New Member 3 Rep 7 Posts Drives: 318D / E90 / Sedan Join Date: Aug 2017 Location: Bucharest, Romania iTrader: (0)	it could be the bearing of one of the wheels. i'm saying this because i experience the same problem with humming, like vum vum vum (lol) at around 60-70 km/h and goes away at speeds below/above one mentioned. my mechanic told me that i shouldn't worry about it, worst case scenario will be that the wheel will get stuck while driving, but that will imply that the noise gets too loud to stand it while driving before this will happen. anyhow, maybe other user can come up with any other ideas. cheers!
	Appreciate 0 Quote

08-02-2017, 06:04 AM	#5
bennye90 Private First Class 43 Rep 108 Posts Drives: E90 328xi Join Date: Mar 2017 Location: Toronto iTrader: (0)	Back from a 70km commute to home and back to work. Just throwing some confirmation info: - same humming sound is still persistent at 80-120km/h - confirmed again speeds outside the range makes no noise - used DS manual mode and confirmed it is not dependent on RPMs, downshift and revup to higher rpm with still the same humming sound - speed seems to be a the dependent with the most noticeable hum reaching 120 Still would like to get others input on this Thanks!
	Appreciate 0 Quote

08-02-2017, 07:36 AM	#6
jt335i Major 263 Rep 1,225 Posts Drives: 2010 E92 335i Monaco blue Join Date: Jan 2010 Location: Tampa, Fl iTrader: (0)	If you have a video or sound clip of this noise, it could help us diagnose the humming. __________________ 2010 BMW 335i: Monaco blue metallic/Premium+Sport Auto-Steptronic, BMW PE, Cobb Stage 2 2005 Mustang GT: Redfire metallic/5-spd/Ford Racing (Axle backs, silver Bullitt wheels)/K&N CAI/ Diablo Sport Predator Tuner 1997 Toyota Corolla 1983 Mercedes Benz 380SL Roadster
	Appreciate 0 Quote

01-03-2018, 05:52 AM	#7
mistertml Private First Class 8 Rep 101 Posts Drives: BMW 318i SE Edition Join Date: Apr 2014 Location: Lancashire iTrader: (0) Garage List 2017 BMW X4 30D M S ... [0.00]	I have the same issue with my car at present. The humming is evident whilst I drive and stops when stationary. I have had my tyres replaced and wheels balanced and tracking done. I'm assuming bearings will need replacing. Just wondering if you managed to sort your issue?
	Appreciate 0 Quote

01-11-2018, 05:57 PM	#9
jmsent First Lieutenant 12 Rep 301 Posts Drives: VW GTI Join Date: Jun 2006 Location: Chicago iTrader: (0)	I had this with my 335i. Bad wheel bearing.
	Appreciate 0 Quote

01-11-2018, 06:13 PM	#10
gT-BMW Lieutenant 214 Rep 438 Posts Drives: 06' 325i 6spd Join Date: Jan 2018 Location: FL iTrader: (0) Garage List 2006 BMW 325i [0.00]	i wonder what the OP hummings sounds like.
	Appreciate 0 Quote

01-12-2018, 07:56 AM	#11
OlliD Private 29 Rep 53 Posts Drives: E92 335i Join Date: Oct 2016 Location: Germany iTrader: (0)	currently, I have the same issue. - installed new and balanced winter tires, does not help. Noise is present no matter what gear / rpm (but starts @ 80km/h til 120 km/h) When turing left/right, noise stays the same. immediately stops when going slower than 80 km or above 120 __________________ Mods: MHD Stage I, xHP, VRSF 3" Chargepipe, Turbosmart DV, VRSF DCI, Golf Tee Mod
	Appreciate 0 Quote

11-10-2022, 05:06 PM	#12
hue90 Registered 0 Rep 4 Posts Drives: BMW 328xi E90 Join Date: May 2022 Location: Canada iTrader: (0)	Currently having this exact humming issue starting at 80km/h. Have you found the problem/fix?
	Appreciate 0 Quote

Yesterday, 02:56 PM	#13
lomon98 Private 6 Rep 61 Posts Drives: 2012 e92 335i Sport + Edition Join Date: Dec 2022 Location: UK iTrader: (0)	Hi, I also get something like what it has been described here coming from the rear axle or back of the car (short audio clip). I get it at around 35-40 mph (so 55- 65 kmh). It seems it is linked to velocity and nor rpms but I am not 100% convinced just yet. Can anyone tell me what is the cause of this noise? Wheel bearing as well? Many thanks!
	Appreciate 0 Quote