Usually. Most systems can be switched and will work in any vehicle. But there have been concerns expressed that some cars do not cope well with sat nav equipment due to heat reflecting windscreens. User groups have identified newer Peugeots, Citroens and Renaults as posing this problem. This is because heat reflecting windscreens stop the GPS receiver from receiving its GPS signal. It is a good idea to try any new sat nav unit out in your car before you buy. You will quickly see if its working or not.