Reverse-Engineered and Rebuilt: Joakim Karlsson Recreates the Saab 900ng / 9-3og ACC Fan Controller
Joakim Karlsson has reverse-engineered the NG900 and OG9-3 ACC fan controller, recreating the PCB from scratch using the more robust OG9-3 filtering design. The project aims to provide long-term repair solutions through refurb kits and mail-in services while retaining the original housing and heat sink.



