This article discusses the two operating systems for the 2012-2015 Lexus GS and their implications. This is relevant only for Lexus GS Conversion Kit (Replacement Screen) customers.
Lexus shipped two operating system versions for the 2012-2015 GS. If you order a Lexus GS Hamilton Conversion Kit, Hamilton will ask you to confirm which version is in your car.
Both use the same OS and MCU version, but the CAN version differs:
Option A: "Base" Lexus GS 2012-2015 OS (CAN Version LXV243 as of 10/25/25)
Option B: "Premium/F-Sport" Lexus GS 2012-2015 OS (CAN Version GSB253 as of 10/25/25)
Hamilton Customer Support will confirm which version you have before shipping and ensure you receive a device with the correct software. If the wrong version is selected, it can be adjusted remotely with Hamilton Customer Support.