Stage 2 BMW 540i B58B30M0 ECU Firmware – MG1CS003 R0C9J8B2B (Decat + Vmax Removed) MG1CS003

Change log

  • v1.0 — 2025-05-29
    • Stage 2 tuning for MG1CS003 (R0C9J8B2B)
    • Decat and Vmax OFF features enabled
    • Full binary supplied, checksum not corrected
    • Autotuner OBD read compatible
    • Original included for reference​

Release notes

  • v1.0 — 2025-05-29
    • Developed for B58-based 540i builds with decat exhaust
    • Vmax OFF enables unlimited speed potential
    • Ideal for off-road performance usage and export market tuning​
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