Amazon being Amazon, there are no guarantees, however …
I bought one of the "Genuine OEM" sensors, dropped it in my dead InstantPot, and it worked like a charm with no fiddling. Assuming the worst, I ran it outside away from windows three times before I brought it back into the house.
I noticed right away that it got up to pressure faster with the new sensor so either my old sensor had been dying for a while or the new one was calibrated slightly differently. Either way, it's been working great for several months now.