Loud, constant noise when driving certain speeds - E46Fanatics E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Thread Tools Search this Thread Rate Thread Display Modes
Old 04-25-2016, 04:24 AM   #1
Registered User
Join Date: Oct 2013
Location: Holland
Posts: 11
My Ride: E46 316 1.9
Loud, constant noise when driving certain speeds

Car; E46 with almost 300.000 kilometers / 186.000 miles

When driving certain speeds there is a loud constant tone. It sounds like hauling wind, or blowing air sideways on an empty beer bottle (like the horn of a ship). When driving ~60 mph you do not hear anything unusual. If I increase the speed to ~70 mph the noise comes up - really loud. It goes away again when I start to driver faster, towards 80 mph the sound is gone (it comes back again around 90/95 mph).

  • The noise almost completely disappears when I engage the clutch.
  • The noise is the same in gear 3, 4 and 5 (as long as you drive ~70 mph)
  • When driving, it sounds like it comes from the back of the car (hence I swapped the differential first).
  • Car shifts fine, I do have another issue when pulling up with clutch half engaged. There is a metal/metal sound – probably the thrust bearing.
  • Noise also depends on load, if I let go of the pedal the frequency also changes (but noise remains).

  • Swapped complete differential (new oil as well)
  • Replaced drive shaft center bearing
  • Replaced flex-disc/guibo

  • Tires, same noise with winter and summer tires
  • Rear wheel bearings, sound almost disappears with clutch engaged

  • DMF/flywheel? Although it is not a rattling sound, but more a constant noise.
  • Clutch/thrust bearing? Although the noise presents itself with the clutch disengaged.

I have done a lot of research but I couldn’t really pinpoint any other parts that might cause this sound. Actually I was pretty confident that the differential swap would solve this – but it did not. Is there anyone who has any idea how I can diagnose this better or what I could try to fix (DMF is an expensive guess).
RazrE46 is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 08-15-2016, 08:20 AM   #2
Registered User
Join Date: Oct 2013
Location: Holland
Posts: 11
My Ride: E46 316 1.9
In the end the issue was fixed by installing part #12 from this diagram. It's a kind of rubberish strap which has to be placed between the top of the central drivetrain bearing and the chassis. It prevents any vibrations/resonance caused by the drive-train to get stronger through the chassis. The part is really cheap, it's a little work to get it in the right spot. You have to lower your exhaust, remove the heat shield, unbolt the central bearing/lower your drivetrain to reach the spot.

Hopefully this information helps anyone in the future.

PS. The rubberish strap (part #12) was not installed out of the factory, it seems like a "fix" advised by BMW.
RazrE46 is offline   Reply With Quote
Old 08-15-2016, 08:26 AM   #3
Yewzer B Lewzer
Registered User
Join Date: Jan 2013
Location: St. Petersburg FL
Posts: 2,262
My Ride: 2003 325i
Thanks for the follow up. Sorry nobody responded to your initial post, usually there is an abundance of advice on this forum.

Good tip here too, I don't think I've heard of this one, it will certainly help someone.
Yewzer B Lewzer is offline   Reply With Quote

loud noise from rear end, noise

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON

All times are GMT -5. The time now is 11:43 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - VerticalScope Inc. All rights reserved.