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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 06-05-2012, 08:32 PM
bogeyorpar bogeyorpar is offline
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Help: Audio system has no sound

My car is a BMW 2006 330i 4 door sedan. A few days ago, suddenly the audio system stopped working. I can still turn on radio, CD, Satellite, Aux, and the screen works (shows channel or CD track#), but no sound comes out of it. It seems like something muted it. However, I can't find any button or menu item to mute/unmute. Any guidance on how to diagnose and fix the issue?

Another maybe unrelated issue: the muting happens right after I took the car to Costco tire center for a tire rotation. Is it possible during tire rotation they accidentally cut some wire?
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  #2  
Old 06-05-2012, 11:00 PM
gcreese gcreese is offline
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Press the volume button. That mutes/unmutes it. My guess is the installers didn't like your choice of music.
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  #3  
Old 06-06-2012, 10:28 AM
bogeyorpar bogeyorpar is offline
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gcreese, pressing the volume button on my car will just turn the audio on/off, but when it's on, still no sound. Is there a trick, like you have to press and hold the button for 5 seconds or something?
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  #4  
Old 06-06-2012, 11:23 AM
gcreese gcreese is offline
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Quote:
Originally Posted by bogeyorpar View Post
gcreese, pressing the volume button on my car will just turn the audio on/off, but when it's on, still no sound. Is there a trick, like you have to press and hold the button for 5 seconds or something?
I don't think so. I just press the button and the sound goes on, press it again, the sound goes off. My BMWs are newer, but I wouldn't think things would change that much. The only other thing I can think of is that they turned the volume completely down and then hit mute. What does the car manual say?
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  #5  
Old 06-06-2012, 12:09 PM
bogeyorpar bogeyorpar is offline
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Do you have iDrive? I looked at the iDrive manual and there is mute on/off options.

My car doesn't have iDrive, and the user manual does not say anything about muting the speakers.
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  #6  
Old 06-06-2012, 01:09 PM
Matrixolution Matrixolution is offline
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Quote:
Originally Posted by gcreese View Post
Press the volume button. That mutes/unmutes it. My guess is the installers didn't like your choice of music.
I think that's the on/off button on my 2011 328.
There is no mute button on mine.

Correct me if i'm wrong.
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  #7  
Old 06-06-2012, 07:08 PM
gcreese gcreese is offline
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Yes, I have iDrive on both my cars.
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  #8  
Old 06-07-2012, 01:24 AM
gcreese gcreese is offline
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And yes, that's the on/off button. OK, my thoughts didn't work. At this point, I have no idea.
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  #9  
Old 06-08-2012, 11:07 AM
ufoj ufoj is offline
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I've had this problem. Dealer explained to me once that it is sometimes caused by paired bluetooth phones aggravating the software, presumably getting stuck in some kind of loop. If you have a phone, can you unpair it, delete it, and see if it goes away?

The other time i fixed this, I just pulled and reinserted the radio fuses in the glovebox and that was enough to "reboot" the stereo.
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  #10  
Old 06-08-2012, 05:01 PM
bogeyorpar bogeyorpar is offline
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ufoj, I deleted all bluetooth devices, but still no sound. Next I'll try the fuses.

On the fuse box cover sheet, I found a symbol that looks like radio, and there are 3 fuses listed. Are resetting these 3 enough? Is there a different fuse for the amplifier?
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  #11  
Old 06-08-2012, 05:27 PM
ufoj ufoj is offline
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I'd try those, it's not going to hurt much anyway. I don't remember exactly, but I have an 09 328, so it might be different.

Does your door gong/chime still work? Or are you getting no sound anywhere?

Also, once this happened and I ignored it and the next morning it was fine. So um, go figure.
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  #12  
Old 06-08-2012, 10:50 PM
bogeyorpar bogeyorpar is offline
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I have no sounds anywhere, except the warning sounds if I left my key fob in the car and opened the door.

The fuse box is in such a bad location that I can hardly reach any of the fuses and I can't see the fuse when my hand reaches in. I'm afraid if I pull one off I can never put it back in again ... any good tools to use?
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  #13  
Old 06-09-2012, 10:38 AM
Manybrews Manybrews is offline
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No sound has two possibilities.
1)software, or
2)hardware.
You could have BMW update the software on the car and see if that fixes it.
If not, it's likely a hardware failure. I didn't see if you have the I drive, or just the radio.
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  #14  
Old 07-14-2015, 11:18 AM
F07530D F07530D is offline
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I sufferred the same problem for about 3 years. After trying to find connection between the problem and potential reason i finally find out that is relating to amount of load in my trunk.
It was lika starting the car with no sound, next start everything working fine, after next start nothing etc.... sometimes it lasts for a week or two, then just start working once, and another few days without sound.
Fault memory was showing AMP int fault or/and AMP overvoltage. Deleting the fault was the cure, but it was really annoing driving 1hr to connect car to the service computer without any guarrantie that it will not stop playing the sound until next start.
For 7 months i was driving with a lot of stuff in my trunk and there was no problem, and some time ago i removed everything and..... it started again.
So the only one logic axplanation was that there are some wires not properly connected.
I decided today to go to service but..... it starts working :o but only for this drive.... so later i went to service to clear the fault memory (that always helped).
How suprised i was that after clearing the fault memory still no sound!!!! and after second check - no fault's at all !!!!
I decided that i have to see how it looks this f...ing LOGIC 7 AMP.
I took this out, all the wires looks ok, but still no sound, and then............... i put my finger on the white wire tape visible thru the ventilation hole and...... just like magic touch..... it starts playing the sound!!!!!!! simple as that. After disassembling the AMP at home, the tape connecting two circut board was U shaped, i changed it to S shape and works fine!!
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  #15  
Old 07-14-2015, 12:48 PM
wilt wilt is online now
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It could be that some liquid spilled in your trunk and it gravitated to the amp location under the floor of the trunk.
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