Stage 2 1-Series 135i N54B30 | MSD81 IFN3S Siemens | ECU Files JE0SIFN3S

Change log

  • v1.0 — 2025-07-30
    • Initial release of a full-feature Stage 2 tuning package for the BMW 135i N54 (MSD81).
    • Includes a primary performance tune and a version with additional patches.

Release notes

  • v1.0 — 2025-07-30
    • Package includes three files: Original, Stage 2 (Main), and Stage 2 (with added patches).
    • Confirm software version IFN3S before flashing.
    IMPORTANT: Stage 2 requires significant hardware upgrades (decat downpipes, intercooler, intake, etc.).
    • Pop & Bang feature is active in sport modes for aggressive sound.
    • For off-road or competition use ONLY.​
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