Had my new 2015 GS for about a month now and absolutely love it except for some problems with the Navigation system. Most of the time it works fine, but I've had 4 cases where it has me located up to 25 miles from where I actually am. It will do this without warning, last for minutes or hours, and then correct itself without warning. Turning the car off then back on has no effect. Anybody have a problem like this? I'm hoping its just something I'll need to contact Lexus Service about to get fixed and isn't a known issue.

 

When I encounter technology related issues, I just call up the Tech Specialists from the dealership I bought my car from. They are very helpful for the most part and help me troubleshoot the cause.