TomTom - you may need to update to avoid issues from now on (1 Viewer)


Aug 22, 2007
E Yorks
Funster No
Carthago Compactline
Since 1996, had Elddis/Swift/Rapido/Rimor/Chausson MHs. Autocruise/Globecar PVCs/Compactline i-138
We have TomTom in our Smart car and had issues with it yesterday:

However this may affect any TomTom device so better check yours is working correctly, info on the reason for it here:


The GPS Week Rollover (WNRO) is a result of how the Global Positioning System was set up, and occurs once every 19.7 years. The GPS provides accurate timing information by counting the number of seconds into a week, and the week number is stored as a ten-bit binary number. This means the range of weeks is limited to 1024 weeks in total, i.e. 19.7 years, before it rolls over to 0 again.

The most recent rollover took place on the 6th of April, 2019.

The GPS receiver chips in some devices might not be prepared for this change, and won’t be able to show the current time or your ETA. The timing of the signals is what determines the distance from the satellites and the position of your device, so some affected devices might also not be able to get a GPS fix or navigate at all after the rollover.

TomTom has already released software updates for most affected devices that prevents any issues from the WNRO, so if you regularly update your device then there’s a good chance that it already has a fix installed.

If you want to check if your device is affected by the WNRO, go to
This page will also give you information on how to update your specific device if need be.

If you regularly update your device but want to know which software version includes the fix, click this link to see the release notes for all navigation devices.
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