I had a scheduled appt to swap wheels and tires and decided to ask in the notes of the mobile app about the HW3 upgrade. They never said anything about it, I just got the invoice for the service appt scheduled tomorrow and it's listed on there.
The line item shows it as a retrofit without electrical wiring rework. I wonder if early on they were changing harnesses and more of the wiring? Possibly just adding some adapters now to shorten the time needed?
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My 2018 required electrical rework. I think the older 3s required some kind of electrical harness upgrade. I lost all my data and lifetime stats, they said there was no saving it for me, I assume it may be related.