Thread: Enable TMC in a nüvi 250W

As your 265W has PCB P/N of 105-01392-03 it's certainly HWID 0827 not 1091 so you should be able to convert it to 465. It is possible to flash full 465 firmware to a 0827 device without problems however many ppl in the past have bricked their devices and that seems possibly related to what had been done in the way of earlier modification, been converted to SG/MY previously for example. PouchX's is a full conversion but it was done with earlier fw and from memory was a little more elegant than simply flashing the original fw. What is safer is to use the original 0827 boot.bin combined with 465's fw_all.bin and keeping the HWID as 0827. That will still get you all available 465 features, your 255W will run exactly like a 465 other than it won't have BlueTooth because it doesn't have a BT module like a 265W does. The 2x5W's boot.bin will load fine and there's no need to change the logo in region 16 either. Make sure you back up region 41 (nonvol) before you do anything whether that's hybrid or full fw conversion.