Don’t know if this is a common issue, but I wanted to be able to mount a handheld transceiver in my m3. If you’re also looking to do this all you need is a Panavise model 75103-599 and whatever AMP adapter fits your radio. The panavise bracket attaches to an existing stud under the passenger side trim, and all you have to do is remove two trim pieces and a nut for the install.