Thread: Enable TMC in a nüvi 250W

I converted an AU 255W with an almost identical board [S2 P1 V6] to 465 some six months ago and it's been used daily by one of my sons ever since. There are other ways of converting to 465 which will change the HWID to 0943 but i prefer to use original 0827 boot.bin for easy recovery if there's a problem. Loly and/or Alviora et al may disagree and suggest a different method and if they do, please follow their more learned advice, however this is i believe totally safe and that 255W i converted for my son has been converted/reconverted several times without issues. As Alviora points out the current model name is not important and of no consequence, it's the HWID & PCB which matter. As i said previously, your 250W is now essentially a 255W. I've converted ~6 x 2x5W to 465 using various methods with both original and 465 boot bins [PouchX's is safe way to HWID 0943 i believe] without problems. After using any method it will identify as 465 on boot.

Main changes: You will get Routes, but will lose EcoRoute. You will get an additional profile for Truck [customizable]. You will get Lane Assist [not with JCV though].

First do a backup of both your files and region 41, and do a hard reset. Then extract the attached pack, connect in preboot and flash the rgn file.

Spoiler: Flasher

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Do another backup of rgn41 after the flash and keep it separate from your original backup.