There's an AI PC in the group I GM for. Much to his consternation, his tricked-out Citymaster was flattened by a GE Vindicator minigun spitting anti-vehicle ammo. The Citymaster took 20 boxes of damage in one go, and it only has 16 boxes on its Condition Monitor.
Another player at the table asked whether that meant it was totally destroyed, or just into its Overflow. I honestly don't know.
So:
Do vehicles have Overflow or are they destroyed when they take (8+half Body) boxes of damage?