[Garcia909]

I have a 328i 2011 lci sedan roughly 40k miles. It cut out while it was raining, when i took it to the dealership they were acting like they have never seen this before. Of course its under warranty but i just want to know if anybody else has experienced this aswell. CDs and auxillary make the same sound also! http://<div class="youtube-playerCon.../iframe></div>

[ctuna]

A lot of people have got water on the amp.
Usually it goes all the way out(no sound at all)you might want
to visually inspect it . That is assuming you have and
amp because some of the 2011's with the base system didn't.
Drivers side (US) in the rear corner of the car under the trunk
floor.
Read the pdf's and establish which sound system
you have if you have the base system then there is
no amp.
If you have hi fi or top hi fi then you do.
Be sure they fix the leak if this is the case.

http://www.e90post.com/forums/attach...2&d=1266451970
http://www.e90post.com/forums/attach...2&d=1260829447

[taibanl]

Ive preciously posted the sib which applies to this (i think - i cant actually hear your sound)

[baynec]

I've got a 2011 328xi Sedan with Base Stereo. I had an intermittent noise on AM, FM, and CD but not on Aux. Radio stuff not associated with bad radio signal. Sort of an overlay of a single frequency and associated harmonics, but not white noise. In other words...it was a single scratchy tone. Usually happened starting the car to go to lunch and then would evaporate when I started after lunch. Never happened first thing in the morning...always alternating. I took phone video of issue, switching from source-to-source each time I started the car over the course of the day. Then I made an appointment with the dealership.

I can confirm what taibanl says: there's an SIB. I think he linked it originally.

Turns out I didn't need the video at all. They could reproduce it. If yours is less predictable, the video might still help.

My dealership first updated the software. That didn't work, so they kept the car for another day, overnighted in a new HU, and installed. Now works just fine.

Edited to add: I couldn't hear your sound either.

[Garcia909]

Thanks to everyone that has replied, my car has been at the stealership for like 5 days now.... And for a radio????? Really?!? I bet if my warranty didnt cover this id be screwed. And for the video, weird im able to hear it on the youtube but atleast you guys get the point haha

[taibanl]

What system do you have, Base/stereo, HiFi, or HK/TopHiFi

[Garcia909]

Originally Posted by taibanl

What system do you have, Base/stereo, HiFi, or HK/TopHiFi

HiFi

[Garcia909]

Originally Posted by taibanl

Ive preciously posted the sib which applies to this (i think - i cant actually hear your sound)

In the video the sound starts to come at around 15 seconds if this is still relevant

[taibanl]

I would suspect water damage as well. Does the noise stay on when you shut the car off?

[Garcia909]

Originally Posted by taibanl

I would suspect water damage as well. Does the noise stay on when you shut the car off?

Yes it does, its actually worse when i dont have the keys in. I heard it when i was at my front door! I noticed it only did that when it unlocked, but even when i locked it the sound kept going on for like 25 seconds. It sounded like as if like you were moving your trash cans to the street

[taibanl]

Originally Posted by Garcia909

Yes it does, its actually worse when i dont have the keys in. I heard it when i was at my front door! I noticed it only did that when it unlocked, but even when i locked it the sound kept going on for like 25 seconds. It sounded like as if like you were moving your trash cans to the street

ok you can probably make them use the SIB to troubleshoot.

[Garcia909]

Originally Posted by taibanl

ok you can probably make them use the SIB to troubleshoot.

How do you think this happened? I had no water near the amp, it makes so sense. It rained but my car has handled the rain before, i also never opened the trunk while it was raining. Also on my drive to dealership the cabin had a smell like something was burning, but it only came on when i was going 80+

[ctuna]

When water isn't spilled on the amp from something in the
trunk, sometimes clogged drains or bad seals have been reported
as a problem.