I presume that ,on a date and time known only to Honda, a car was the last one ever to come off the production line fitted with the old vulnerable simulator , with maybe the very next car, and all subsequent cars, having the improved version.
But did this transition coincide exactly with a change in the vin number series stamped into the car bodies passing down the assembly line. I doubt it.
Honda probably know from the production date which PS vin series cars are likely to have the old simulators, and those likely to have the new version and wont need to be recalled . Is "'you're not on the list, you cant come in" (for a recall) a reliable indicator?
But I suspect there may be a period or periods around that time when a shortage of the new version might have resulted in it being a bit of a lottery which type was fitted on the production line that day. . I dont recall Honda ceasing production of the Jazz at any point, even when for a while they must have known an improved simulator was being planned.