hello
mazda will only say replace the DHS control unit i havent come across anyone yet who is reprogramming these units the unit is located next to the drivers rear strut top on a alloy vertical bracket it has three yellow plugs 2013 to 2015 mk3.75 mx5s
i have everything in stock for the 2013 to 2015 DHS system if you get stuck all removed from a undamaged 2013 mazda mx5 mk3.75 2.0 sport tech nav roadster
regards