Stage 1 Fiat 500 1.3 JTD — Marelli MJ9DF 4F42B222 — Calibration File 55283475

Change log

  • v1.0 — 2025-06-14
    • Initial Stage 1 calibration for Marelli MJ9DF (SW 4F42B222)
    • Driver-wish, boost & injection maps revised
    • Torque limiters adjusted for 6-speed manual gearbox
    • Checksum integrity verified​

Release notes

  • v1.0 — 2025-06-14
    • Package includes Original + Stage 1 binaries
    • Confirm ECU hardware 55283475 and software 4F42B222 before flashing
    • Compatible with tools supporting Marelli MJ9DF controllers
    • Designed for stock engine components and 6-speed manual gearbox; log key parameters after installation
    • Intended solely for off-road or motorsport applications​
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