my mirrors normally work fine when put in reverse but for some reason the passenger one has decided to only dip a small amount when put in reverse, I've tried adjusting and saving again but just goes back to the same position but drivers side dips fully. any ideas why?

Having the same issue too, my passenger side will not dip at all when selecting reverse or when trying to adjust, will turn left and ringht but not up and down  RRS SUPERCHARGED, 22 INCH ALLOYS, JAVA BLACK, FULLY COLOUR CODED
EVERY POSSIBLE SOFTWARE UPDATE INCLUDING - BLUTOOTH UPDATE, SATNAV ON THE MOVE, CLOCK ON DASH, 3 CLICK FLASH, GEARBOX RESET, COMPRESSOR UPDATE AND SUSPENSION LOWERED,
BLACK CODE RE-MAPPED, AUTOBIOGRAPHY'D, NEW EXIDE BATTERY, NEW DENSO ALTERNATOR

Oh no I can adjust mine fine it even moves slightly when I select reverse just won't go all the way down like before. I don't know if there's any way of resetting them ?

I had a x5 that had same problem, I removed mirror glass and un screwed the mechanism that hold mirror in place and there is 2 metal contact prongs that functioned the mirror tilt, I gave them a clean with contact cleaner and bent the prongs slightly to be sure of good contact and all was good again, don't no if the sport uses the same princable but thought I'd mention it (maybe it will help)

Got to be worth a try thanks , annoying when it won't go down all the way 😡

Had the same problem & fixed today. Went into settings on the stock, mpg,range etc. Press & hold & brings up a other menu changed the reverse/mirrors to auto. Mirrors now dipping.