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That's right, somewhere around 2020 they switched DMEs and those require a 3rd party unlocker by a company overseas.
If the car is running the latest software, or had been to the dealer for updates, it will be locked. The software lock of older DMEs can be unlocked by a "bench unlock". There may be other software solutions to unlock the older style DMEs these days. I'm not up to date on all the details as my '17 was unlocked.
BM3 and MHD are two of the common off the shelf tuners around here but there's more out there. Dinan, MG flasher, alpine, celtic... there's dozens.
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