I 'll keep it short as to not beat the dead horse anymore - When installing an aftermarket HU, do I have to relocate Mazda's BOSE unit to keep all the AC / clock functions? And if I do relocate it, any ideas on a new location and the best DIY wiring harness to do so.

 

Best thing to do is to ride the dead horse with the search button as this has been discussed more than numberous times. In short words, yes and it is not fun nor easy.