Car insurance shock - How simply using a sat nav could invalidate your cover MOTORISTS could invalidate their car insurance by using a sat nav while driving on the roads due to the fact it could be classed as a modification. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:ULEZ check - How much will the emissions zone charge you? Is your car affected?Car insurance WARNING: You could be invalidate your cover making this fault with your petDriver WARNING - Clear snow off the roof of your car before setting off or risk a £60 fineCheck your car tax using this tool ahead of 2019 price rise - How much more you'll payTesla Pickup Truck could be unveiled in summer 2019, says Elon MuskDefrost car windscreen WARNING - Simple engine mistake can invalidate your car insurance