The guy who allegedly broke into a Lamborghini dealership and jacked NBA guard Terrence Ross' expensive whip has been arrested and charged ... and turns out, cops say the suspect is a 16-year-old kid.
As we previously reported, Ross' Lambo Urus -- a fancy SUV that starts at $220k -- was stolen from the Fields Motorcars of Florida dealership last month ... and the car ended up wrecked in Maitland, about 10 miles outside Orlando.
TMZ Sports has learned ... a male teen was charged with Burglary of a Structure and 3rd Degree Grand Theft after a month-long investigation .