My Lexus Dealer refused to fit a rear Dashcam due to the number of people who had complained that it interfered with the DAB. I asked them to do it and said that I would be happy to lose DAB reception as I don’t listen to the radio often. Of course, I was happy to put this in writing so there was no danger of me ever logging a DAB reception complaint.
If I sell the car I will pass that info on - a new owner may want to ditch the camera to get perfect DAB.