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06-09-2021, 02:01 PM | #1 |
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SOS and Radio inop
Whenever I drive the car for a long period of time, let's say like 2+ hours, my radio goes off and my SOS mil comes on and the radio won't work for a long while, then it'll come back on and it won't be able to be as loud as it was. Usually I know when the radio will go out because the volume will go low, and I won't be able to raise it back up. Whenever I turn off the car and let it sit for a minute, then start it up, everything goes back to normal. Can I get some help with this issue
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06-09-2021, 06:01 PM | #2 |
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Sounds like you might have a head unit or amplifier that's about to go - or basically one of the units on the MOST bus is about to go.
The amp, head unit, bluetooth, satellite radio, and a couple of other modules are connected via a Fibre optic network called the "MOST bus". When one of these components has an issue, the light doesn't pass through that component and the entire "chain" goes down and typically the SOS warning comes on. Do a google on "SOS error bmw" or similar and you'll see tons of Youtube videos and forum posts on this issue. It could be a number of things and you need to eliminate each module one at a time to see which one is causing the problem. There are probably diagnostic tools to help you do this, in my case my headunit was completely dead and it was fairly obvious, I bought a used one and swapped it, all back to normal. |
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06-10-2021, 01:22 AM | #3 | |
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06-10-2021, 07:45 AM | #4 | |
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I'm sorry I don't have much more to give you on this....it's going to take you some digging and search, or someone else that can chime in to assist... |
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El Versace0.00 |
06-10-2021, 10:46 PM | #5 | ||
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