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Upgrading tomtom one 125 navcore

Mon Aug 18, 2025 11:38 pm

Hello all,

I'm a french Tomtom user and I have an old Tomtom Europe 31 with the following settings:
ttgo.bif:
DeviceName=TomTom ONE
DeviceVersionHW=ONE (v8)
DeviceSerialNumber=PCxxxxxxxxxx
BootLoaderVersion=55011
ApplicationVersionVersionNumber=8010
ApplicationVersion=9369
CurrentMap=Europe_West_1110_11863
CurrentMapVersion=1110.11863

Map(s):
E:\Europe_West_1110_11863\

Storage:
Size 1955MB, Free 183MB

As the serial number starts with PC, I found it is a one 125 with 32 Mb RAM and 2 Gb storage.
I can't update maps now because there is no more compatible maps with meta.
I found that some Tomtom can be upgraded to navcore 9.

Does someone know if my tomtom is compatible with Navcore 9? And if yes, can I get a link to the right version?

Thanks for your help.

Re: Upgrading tomtom one 125 navcore

Tue Aug 19, 2025 2:00 pm

Hello @Cyrus12,

My One 125 ("PBxxxxx" 1Gb) is running 9.541 LE navcore for 32Mb device with France 1155_12878 just published (Nav3 map but optimized for Nav2).
It's an old 32Mb device, so slow at starting, ... but always doing well.

A 9.510 navcore for 32Mb device could also be used.
Have a look at this post : Universal Navcore Installer, an interesting tool.
According to the last page, it is still working (pw downunder).

In your One 125 ("PCxxxx" 2Gb) you could run "Benelux_DE_AT_CH_France 1150_12727" (or 1155 as soon as published) a Nav3 map, shrinked with Optimise in Nav2.

Re: Upgrading tomtom one 125 navcore

Tue Aug 19, 2025 7:41 pm

Hello,
Thanks @jcoltrane

I did some search and downloaded 9.541LE navcore.
I also saw some post talking about a special edition navcore "9.541 SE" by tonyzeta that suits 32mb stuff. So not sure the original LE version will work on my tomtom.

However all the links I found are dead.
Maybe someone can post a new link for this SE version ?

Edit: found a recent post in topic general-discussions-about-tomtom/old-tomtom-questions-t23308-15.html#p199863
so asked there if I can get the files

Re: Upgrading tomtom one 125 navcore

Fri Aug 22, 2025 12:23 am

Hello,
Finally with the help of contributors I succeeded in upgrading my tomtom one 125 to navcore 9.541_SE.
Thanks all for the informations and help I could gather here.
:thread_solved:
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