What ho one and all,

Thinking of fitting a dashcam to my 2015 M3. As the screen already has a large blacked out section for all the electronic bits and bobs, don't really want another large item intruding the view.

Most dashcams appear to hold everything in one unit, but is there a model that is more akin to a reversing camera; i.e. a small lens that connects via cable to the electronic box with memory card?