GPS Week Number Roll-Over




Hello All,
The GPS Week Number Roll-over (WNRO) on 6 April 2019 may have an impact on GPS performance. If you frequently update your device there’s no need to worry!
- Current navigation devices (Nav4) are not impacted.
- Sports and Action devices are not impacted.
- Some older navigation devices (Nav3 = using to MyDrive Connect and Nav2 = using HOME) may be impacted.
We have already started rolling out fixes for this last year. If you frequently update your device, you will already have installed it.
On https://www.tomtom.com/en_gb/updates/ you can check if your device is impacted using your device serial number.
Without updating, these devices may experience some of the following issues:
- No time
- Frequent loss of GPS fix
- No GPS fix at all - navigation impossible
See also:
List of latest software versions
Tip: Expand the list by clicking the “Show previous release notes” at the bottom.
Finding the software and map version on your navigation device
Edit:
Short video: WATCH HERE
Complete video:

Regards,
Vikram
Comments
https://www.tomtom.com/en_gb/updates/
The satellites play a crucial role in deciding the position of your current GPS location.
A combination of GPS hardware and firmware helps in tracking locations on the PND's.
Some TomTom devices may not be able to adjust with the WNRO change as mentioned by @VikramK resulting in the following-
Nav3 and Nav2 devices may experience some of the following issues:
No time
Frequent loss of GPS signal
No GPS signal at all - navigation impossible
Best way to check if your device is affected is to enter the serial number in the link provided on their website...
3, 2, 1, blastoff!
Lucify
I tried entering the serial number of your GO 5200 WiFi starting with 'ZB' which shows me this message
Could you check again, please?
Thanks
Vikram
I tried on the English page and there it is as you mentioned it, but on the Belgian (Flemish) page it is as I mentioned. Probably a problem on the website.
Thank you... I will inform the team looking after this..
Regards
Vikram
The website has been fixed..
Regards
Vikram
I checked the Belgian page and it works OK
How can i : Did a reply resolve your query, please mark it as answer?
However whenever I connect to TomTom home it doesn't have any firmware updates.
https://discussions.tomtom.com/en/discussion/1108398/carminat-tomtom-live-gps-week-number-rollover-event-april-6th-2019/p1?new=1
Community Manager
Superuser
Please advise what model of Tomtom unit you have.
Doug
Both the Start 20 & Go Live 1005 have been identified as needing the Rollover update but neither show the update concerned when connect to my pc.
The update which covers the fix for the GPS roll-over was included in a firmware released last year....
HERE you can find which is the latest software version available for your device and HERE you will find the steps to check if your device is already on the latest version.
Thanks
Vikram
So why were we not told that instead of a vague "Maintenance release"?
Secrets & lies? Ignorance? Indifference?
Superusers
Thanks Vikram
My NAV3 Via 120 Live & GO 825 Live... Both have Version 12.075 all good
ATB YFM
Your GO 6200 WiFi is unaffected by this!
See the first post on this topic...
Here is a website where you can confirm: https://www.tomtom.com/en_gb/updates/
by entering the serial number of your device.
Regards
Vikram
Superuser
Superusers
@NJFR
The NAV5 (Wi-Fi) devices like you’re GO 6200 normally update using Wi-Fi... But you can also update over USB
See Option (2) in this Post... https://discussions.tomtom.com/en/discussion/comment/1623527/#Comment_1623527
ATB YFM
Superusers
What device do you have?