Does anyone know more about this? How do I get the update if this is true? I can not find anything in the Jaguar site.

As a part of the time stamp sent by the GPS satellites, there is something known as the Week Number- literally just the number of weeks that have passed since an epoch, originally set to January 6, 1980. Along with this Week Number the number of seconds since midnight on the previous Saturday evening is sent, thus allowing the GPS receiver to calculate the exact date.

Every 1024 weeks (about every 19 years and 8 months) from the epoch, the number rolls back to 0 owing to this integer information being in 10 bit format.

Thus, when this happens, any GPS receiver that doesn’t account for the Week Number Rollover, will likely stop functioning correctly, though the nature of the malfunction varies from vendor to vendor and device, depending on how said vendor implemented their system.

The next Week Number Rollover event happens on April 6, 2019.

If you’ve updated your firmware on your GPS device recently or simply own a GPS device purchased in the last few years, you’re probably going to be fine here.

However, should you own a GPS device that is several years old, that may not be the case and you’ll most definitely want to go to the manufacturer’s website and download any relevant updates before the second GPS epoch.

How Does GPS Actually Work and Why Many GPS Devices are About to Stop Working