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Hi all,

just a general question - I have a 2008 125i M sport convertible and yesterday, took it into BMW as the radio volume goes up and down randomly, even when sitting in stationary traffic. They replaced the antenna unit, but as I drove away and got nearer to home, it continued to carry on like it did before. Anyway, I have noticed that it does this random volume thing when the RDS button is selected. I havent informed BMW yet, but in the meantime, have any of you experienced this? I'm wondering if it is a common fault or just RDS keeps 'scanning' to find best signal??

Thanks
 

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The volume shouldn't be affected by signal quality, it'll either be able to play it or not, and bad signals make the radio shut up for a second or so whilst it tries to go to the next channel.

There is an overlap between radio stations, and sometimes they can switch between masts, and sometimes they aren't playing music at the same volume on each mast which would do what you mention.
 
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