Hi Paul... please don't quote me but IIRC pic 2 & 3 show the Radio Aerial amplifiers.
As for pic one ... if it was me I'd unscrew it off the interior panel and look for manufacturer label or BMW part number, cross reference it with RealOEM and that should tell you what it it... infact same process for pic 2 & 3 just to make 100% sure

I hope that's of some help.