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E63 / E64 6 Series (2004 - 2010)
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  #1  
Old 09-09-2019, 04:56 PM
Rayrod Rayrod is offline
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Mein Auto:
2005 645ci no audio.

Hi guys,
I'm new here, and I know this topic has been discussed before but for what I see, my car is behaving differently. The audio from the radio does not work but yet I can here the Chime. Also, no SOS light witch must people get with this problem. The one thing I found is that the controls for volume and navigation on the stereo wheel do not work either. I watched a bunch of videos about inspecting the steering wheel, I took it apart, no failures or broken parts. Also checked the optic cables on the amp. Sat computer, CD changer and the glove compartment plug. They all have the red light and as soon as I disconnect any of them, the chime stops working.

Please help! Thanks
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  #2  
Old 09-09-2019, 05:57 PM
HerbP HerbP is offline
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Mein Auto: 05 645Ci, 14 750 M-Sport
Is the radio showing up in the IDrive at all, but just no sound. Try pushing the radio power button along with both eject buttons at the same time. This will force a reboot of the IDrive. If this does not help, it sounds like your amp might be toast?
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Old 09-09-2019, 07:19 PM
Rayrod Rayrod is offline
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The radio functions are normal on the screen and I tried the reboot of the I drive about 4 times. Nothing changes.
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Old 09-09-2019, 07:23 PM
Rayrod Rayrod is offline
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The dynamic drive malfunction is on. Does that relates to the audio somehow?
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Old 09-09-2019, 07:52 PM
HerbP HerbP is offline
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Mein Auto: 05 645Ci, 14 750 M-Sport
That would be from a bad voltage regulator in the alternator, possibly shutting down modules. Below is a link on Ebay as you will not find it at a local store. The alternator must be removed to access the voltage regulator. There should be a DIY in the Sticky at the top of the page.

https://www.ebay.com/itm/BMW-545i-64...QAAOxyUrZSqAKK
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Old 09-09-2019, 08:38 PM
Rayrod Rayrod is offline
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Thanks Herb!
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Old 09-14-2019, 09:59 AM
BimmerBoy3 BimmerBoy3 is offline
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Mein Auto: 2010 BMW 650i Convertible
I had this problem for months and it drove me crazy. What I found fixed it was to put an optical loop on the TCU behind the rear seats.
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Old 09-19-2019, 04:06 AM
Rayrod Rayrod is offline
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That's the weird part. I purchase one optical loop and tried it everywhere (TCU, satellite, cd changer ) still no sound. In the glove compartment, the optical loop end is showing the light so, I think that the optical loop is fine.
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