Navigation updates are released on a yearly basis, however the purchase of a navigation update is optional. Updates provide new map and POI (points of interest) information you may find helpful. Navigation updates are only available for purchase at a Lexus dealership. The MSRP for the Version 18.1 update (excluding the SD card based version for GEN8 and GEN9 vehicles) is $169.* The MSRP for Version 18.1 SD card based updates for GEN8 and GEN9 vehicles is $210.* *Prices may vary by dealer and do not include installation or taxes.