Could not find a manufacture date number on box or on back of the 40" TV. Already mounted on wall, so hard to see.
Mine was assembled in Mexico, that was on a label on the outer box.
Best Buy supervisor said it had a four year Parts & labor warranty, however, the booklet that came with the TV I believe said it was a two year warranty.
HiSense in states contact number for these type of questions is: (888) 935-8880