I have a non-iDrive, logic 7 e90 with the professional radio on which I would like to do an upgrade...I've read that I can recode my head unit from Logic 7 to HiFi in order to get balanced outputs from the head unit. However, I'm not sure where I get a harness to get these new outputs from the head unit. Do I just find a standard HiFi harness?
E90 head units
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