[cesarortiz23]

Hey you guys so today I changed out my rear tires
first of all they where done already but I also thought my noise was coming from the tires being worn out but now that I have new tires I'm still getting this

Humming whining type noise to me it sounds like is coming from the differential

any one here has had this problem and got it fixed

should I do a diff oil service on it ?

I wish I can upload the video I took

What you guys think it is

Rear bearings
Or diff problem

[cesarortiz23]

Here is the link to the video you can hear it perfect.

[_bdiddyb_]

Are yours x-drive? My friend's e92 had this problem at 40mph. His custom 20" wheels were all re-balanced but noise still there. Had transfer case replaced by dealer - problem still there. Strange that dealer couldn't figured this out. I had him put back his old stock rims and tires, problem went away. So - it was the wheel/tire combination that was not jiving with the xdrive system.

[cesarortiz23]

Originally Posted by _bdiddyb_

Are yours x-drive? My friend's e92 had this problem at 40mph. His custom 20" wheels were all re-balanced but noise still there. Had transfer case replaced by dealer - problem still there. Strange that dealer couldn't figured this out. I had him put back his old stock rims and tires, problem went away. So - it was the wheel/tire combination that was not jiving with the xdrive system.

Hmmmmm

Non x drive


And I have 20 inch wheels on my self too

I think is going to be my wheel bearings

The rear ones

[arkangyl]

Just found this thread - I've got basically the same sound in my 335 xDrive
- typically do NOT notice it during the first ~5-10 minutes of operation
- seems worst 5-40 mph, not always there
- no noticeable change side-to-side (past bearing issues you notice when you load up the impacted corner)

Curious if you ever got this resolved?

[cesarortiz23]

Originally Posted by arkangyl

Just found this thread - I've got basically the same sound in my 335 xDrive
- typically do NOT notice it during the first ~5-10 minutes of operation
- seems worst 5-40 mph, not always there
- no noticeable change side-to-side (past bearing issues you notice when you load up the impacted corner)

Curious if you ever got this resolved?

Yes it got resolved it was both of my rear wheel bearings


My noise was a constant grinding humming wining noise


All the way from slow too fast speed and it got pretty loud

[arkangyl]

Thanks for the update - that sounds consistent with bearings if it completely grows with speed