BMW X4 G02 40i B58 ECU File – MG1CS003 R0C9J8I4B / R0C9J8I4BCGNX0 (CAT OFF, Vmax OFF, Sport Display) R0C9J8I4B Stage 2 

Change log

  • v1.0 — 2025-06-01
    • Stage 2 file with CAT OFF, Vmax disabled, and Sport Display unlock
    • Optimized for FEMTO boot/bench protocol
    • Includes original backup binary​

Release notes

  • v1.0 — 2025-06-01
    • Built for modified G02 X4 40i vehicles using performance exhaust/intake
    • Enhances drivability, feedback and top-end freedom
    • Not road legal — intended for dyno and competition use only​