2014 Toyota Highlander XLE - can I add a Brake Box?

Thanks everyone. Yes, I did mean brake controller. I also saw places like etrailer offer them (for my model they say) but having 2 wiring guys warn of problems with all of those new computer systems has made me question... We've got a call in with the dealer now. I've seen on line that even that answer will depend on what service tech you are talking too. Was just curious to know if anyone has actually attempted it yet with a 2014 and had success. Thanks again.