I couldn't say if this would
I couldn't say if this would work or not. The voltages must be same or very similar. If the rated or nominal voltage is the same for either pack (same battery chemistry and same number of cells in serial), then it should work. I don't personally have knowledge of what the pack voltage would be, but unless they changed the motor output (KW or HP) between the original (your old leaf) and the 2016 volt you are taking the pack from, it should all work!