Updates are completely voluntary and are not necessary for optimum performance. Drivers should be aware of the release timing of future Updates, wherein this case with Lexus, it usually comes out during fall. Since most drivers will not experience a significant mapping change with an update so most people do not need to update the Navigation map every year

The Lexus Navigation DVD version 5.1 will upgrade the following cars of Lexus and Toyota

Lexus

ES3002004 2006
GS300/430 2006
GX470 2005 – 2006
LS430 2004 – 2006
LX470 2004 – 2007
RX330 2005 – 2006
RX400H 2006
SC430 2005 – 2008

Toyota

CAMRY 2004 -2006
SOLARA 2004 – 2006
HIGHLANDER 2004 – 2006
SIENNA 2005 -2006
4RUNNER 2005 – 2006
PRIUS 2005 – 2006

Part Number: 86721-33045