No, they do NOT revert the programming back when the updated phasers are installed. As mentioned, the software was the root cause of the failure. When the new phasers went into production in 11/2019, so did the new calibration. Meaning all builds with the new phaser part number already had the new software released in 21B10.Not sure how to make it any clearer my point is there is an updated hardware that’s been out since 11/2019 that hasn’t been an issue. Why would you want the one that had known issues that had to be fixed with software. Do they not reverse the programing back to the original duty cycles when the updated phasers are installed? I know there are still instances where the customer had the recal done before 2/22 and still have had the old phaser style fail. Does ford want you to replace those with the old style phasers in that instance? There is a reason borg Warner fixed the design. Kinda seems silly you wouldn’t agree the new style phasers would be better being a ford tech and saying you haven’t seen them fail. And for everyone saying it’s a small sample size, sure but it still doesn’t negate the fact there is a better part in the later builds. So I will stick with my recommendation to the op.
Of course there were going to be some vehicles that experience the failure after 21B10, it doesn’t reverse wear that may have already occurred in some vehicles. Hence the reason for 21N03, which extended the warranty on the phasers.