Kess tools can come as official Alientech units or as third-party clones; compatibility with 2.90 depends on hardware and licensing. Official units receive vendor support and updates; clone units may require community patches or specific procedures—exercise caution and always keep reliable backups.
: A clone Kess 2.90 can permanently destroy an ECU by corrupting the bootloader. Professional tuners avoid clones. Kess 2.90
The market is flooded with (e.g., “Kess V2 5.017” or “Green PCB” versions). Differences: Kess tools can come as official Alientech units