Important detail: we don't have the software listing. Hence my #1 and #3 response. Is there a coulomb counter, or is it triggered on pack voltage? What's the BMS CAN/LIN messaging?
Could be a bolt-in, could be a controller redo.
With no data it's an expensive crap shoot, which is why many of these got converted back to pure ICE when they stopped working. The latest eBay pricing on VTrux makes that a silly thing to do, so...checkmate.