[greg2006325i]

I have only had the car about 5 weeks....When I turn on the radio I notice that sound only appears to be coming from the rear speakers....When I crank up the volume to about 3/4 or more the front speakers start working normally again and appear to stay on....I need to do this procedure every time I get in the car to get the front speakers to work.....Any idea what the problem might be?....thanks for any replies

[colorado.e9x]

Set the Fader to 0 and see what happens

[greg2006325i]

Originally Posted by colorado.e9x

Set the Fader to 0 and see what happens

It is at 0...I have already checked settings...It should have an equal distribution to front and rear speakers....but after the car sits for a while I have to crank up the volume to get the front speakers to engage and then they will work on any volume.....until the car sits for a while again


maybe the amp in the head unit has failed......and I need to replace the head unit?

[ctuna]

Either it will have the Hi Fi system option 676
or the Top Hi Fi , Logic 7 option 677.
Amps are in Trunk area .(read the third link Entertainment system
pdf)

A common problem is water on the amp.
The amp is located behind the US Driver side wheel well under
the trunk cover.

You can buy the Hi Fi amps cheaply on Ebay the Logic 7 amp is more
expensive.

You can print out your option numbers by running the Vin through
mdecoder.com (so you can figure out what you have)

BMW stereo types
http://www.e90post.com/forums/showthread.php?t=352586
http://www.e90post.com/forums/attach...2&d=1266451970
http://www.e90post.com/forums/attach...2&d=1260829447
http://www.e90post.com/forums/showthread.php?t=138949
http://www.e90post.com/forums/attach...1&d=1209780865
http://bmwcoders.com/forum/3-er-8/bm...1-e92-e93-291/
http://technicpnp.com/menuDiagrams/d...e90_92_93.html
http://www.musicarnw.com/page-2/
http://www.e90post.com/forums/attach...3&d=1169133185
http://www.e90post.com/forums/attach...1&d=1209780605
http://www.e90post.com/forums/showthread.php?t=641323
http://www.e90post.com/forums/attach...4&d=1278871872
http://www.e90post.com/forums/showthread.php?t=343673

Also it's possible for the stereo to be turned off by the IBS system if you have
a weak battery. Read about IBS in the first electrical pdf.
Battery voltage should be above 12.4 resting.
Try putting a slow full charge on the battery if its under 12.4
measure the battery voltage at the end of the day and again in the morning
to see if it can hold a charge.

electrical pdf
https://www.google.com/url?sa=t&rct=...,d.cGU&cad=rja
http://www.shrani.si/f/G/fL/2lp3YVG1...hicle-elet.pdf
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU

[NickRay]

I'm seeing the same thing, 676 stereo, 2009 328i. It comes from any audio source, CD, radio etc. I re-soldered a few joints on the amp that looked faulty, no change

[ctuna]

http://www.e90post.com/forums/showthread.php?t=1036190

If you have pro radio the above.

[NickRay]

I might indeed have that radio. For that price, probably will just live with it.
And thank you for the help like always @ctuna

[NickRay]

Going to try reconnecting the MOST cables on the back of the HU for a potential $nocash fix

[NickRay]

yeah, that did not fix the issue lol. Maybe I will try to find an unaffected HU on ebay

[NickRay]

After thinking about this for a while, I think one of the 7" Android HUs might be the route I take. The replacement OE HU with the updated part number is just too expensive for what was an $8k car. And it looks like no matter which used HU I get, if it's an older one it will have problems. Either the sound output issue, or the display will develop dead pixels. CarPlay would be pretty sweet to have too. For $250 or less, I don't see the OE HU as a comparable option.

[NickRay]

Old thread bump, car was acting a bit strange so I ordered a new voltage regulator and also picked up a used HU from a later model LCI E90, 65129242505 part number. If that combo solves my radio issues, I will update this thread.

[TheTallJS]

take off door card, check wire connection to speaker.

[NickRay]

Nope, didn't need to touch the door card/speaker wires. After replacing the battery and the voltage regulator, the stereo works perfectly now. So this issue was probably a low current problem all along.
If someone else is having radio issues, maybe start to think about replacing your battery. Mine was measuring 12.0v with the car off, so it was very close to being toast.

[hapklaar]

Originally Posted by NickRay

Nope, didn't need to touch the door card/speaker wires. After replacing the battery and the voltage regulator, the stereo works perfectly now. So this issue was probably a low current problem all along.
If someone else is having radio issues, maybe start to think about replacing your battery. Mine was measuring 12.0v with the car off, so it was very close to being toast.

I have the same issue, but even after changing the battery issue remains. Curious, was your fix permanent or did the issue return?