Clarion typically does not host these files on a public consumer site forever. You may need to visit the portal or specialized automotive forums (like Suzuki Club or A-Kizashi ). Search for: Clarion PX4226AA MCU Update [Latest Version]
This update is still hot – Clarion has not pulled it. If you have the PX4226AA with build date before 2025-12, do this update. Your unit will feel 2x faster. clarion px4226aa firmware update hot