I had the NAV disk replaced on my 2007 LR3 by the dealer about 1 1/2 years ago. Now it shows me way off my current position while traveling. Nothing seems to bring me right on position. Just came back from a week trip and there was 40 miles on a corrugated dusty road. After that I noticed the malfunction.
Any possible remedy that you might suggest would be helpful, without my going back to dealer.

 

Sounds more like a sensor issue than disk issue