Hello,

I am looking for some help on replacing the steering ECU on my '04 GS300. I could not find an L-tuned steering ECU (that comes with directions), but was told replacing the GS300 with a GS430 Steering ECU will help. Cannot find active links on the directions of replacing the steering ECU. If anyone could help me out I would greatly appreciate it.

Thank you!

 

I was told that certain years like 02+ GS already had the ECU upgrade. But you may want to do a search.

 

dont' wanna comment on the application, coz' no one knows for sure if 01+ gs has the ecu already

but the instructions, you can do a search by doing "steering ecu install" and a lot of results come up

https://www.clublexus.com/forums/sho...NG+ECU+INSTALL
https://www.clublexus.com/forums/sho...NG+ECU+INSTALL
https://www.clublexus.com/forums/sho...threadid=62437
https://www.clublexus.com/forums/sho...cu+instruction