I would like to reawaken this thread, I recently noticed that my car does not have a BMW Bluetooth antenna, I followed some wires from my Bluetooth and found that they go to the armrest where there is nothing but cables, looks like it for an eject box. The other cable goes to my dsp. After searching online I noticed that the blue tag on the TCU is for the Bluetooth antenna cable which should be mounted on top of the components. I purchased the antenna today and I just need to find a cable. I will keep all posted on the progress.

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