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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 10-27-2013, 05:44 PM
mr-bmw mr-bmw is offline
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Unhappy ratteling noise when driving on uneven surface

Hi I am have a 2006 E90 (330I) I love the car drives like a dream with lots of power and great sound.. BUT just yesterday this very weird and annoying noise have started, it sounds like 2 plates hitting each other and when i drive over bumps or any other road scenarios to make the car shake this sound will come. it's driving me nuts, I cant figure out where its from, I have emptied the glove box, the sh trey and its still there, I remove the windshield wipers didn't work... any one else who have had this noise? any advise?

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  #2  
Old 10-27-2013, 11:42 PM
mr-bmw mr-bmw is offline
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bump
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  #3  
Old 10-28-2013, 06:25 AM
R1200 R1200 is offline
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In my experience worn or loose suspension parts (sway bar) or exhaust system are the usual culprits once you have secured all of the tools and junk in the trunk.

You can sometimes move the exhaust system by hand to see if it touches the body or find a section of road where the problem happens and drive over it a few times listening for noise location. I take along a passenger to help locate the sound.

A bad sway bar bushing will transmit the sound throughout the car. You may need access to a hoist to check for any loose parts. A rubber hammer helps to create localized vibrations and repeatable noise.

I doubt that there is any one cause for noise complaints. You need to find it yourself.
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Old 10-28-2013, 08:49 PM
mr-bmw mr-bmw is offline
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but the sound comes from the center part of the dash.. not from the back
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Old 10-29-2013, 12:33 PM
R1200 R1200 is offline
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Can't help much more as you need to investigate as suggested by running over the same bumpy road and/or by using a rubber hammer to tap body areas that will recreate the rattle sound.

Our car has 160K km and it is still solid without squeaks or rattles so your problem must be unique.

Perhaps during the last service of the cabin filter a tool to bolt was dropped into the air box. It's worth checking.

Good Luck.
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Old 10-29-2013, 12:38 PM
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thekurgan thekurgan is offline
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Quote:
Originally Posted by mr-bmw View Post
but the sound comes from the center part of the dash.. not from the back
Have you checked the speaker grill in the center? It's a really poorly engineered plastic-on-plastic thing.
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Old 10-30-2013, 09:29 AM
mr-bmw mr-bmw is offline
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yea I have verified that it comes form that area, I dont know how to open it though haha.. any ideas?
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Old 10-30-2013, 12:12 PM
fdriller9 fdriller9 is online now
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Check the braces going from the strut towers to the firewall. The mounting location for the braces tends to strip out and make noise as it hits the firewall.
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Old 10-30-2013, 12:45 PM
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thekurgan thekurgan is offline
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yea I have verified that it comes form that area, I dont know how to open it though haha.. any ideas?
Use a credit card. It is two pieces, the upper lifts out easily, while the lower (holds the voice speaker) requires T-20 bits. You may not need to remove the lower portion, just apply some thin felt on the back of the top cover. See this diagram:
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