Stage 1 Ford Focus ST 2.5 Turbo Stage 1 ECU Tuning File – CM5A-14C204-ARG (MED17) CM5A-12A650-ARF

Change log

  • v1.0 — 2025-05-27
    • Stage 1 calibration for Bosch MED17 (CM5A-14C204-ARG)
    • Boost, timing, and throttle parameters enhanced
    • Checksum validation with OLS807 v3.32
    • Full binary with original included​

Release notes

  • v1.0 — 2025-05-27
    Optimised for the Ford Focus ST 2.5L Turbo, this Stage 1 file sharpens throttle and midrange torque using Bosch MED17 logic. Safe and effective for daily performance upgrades — no hardware changes needed. Delivered with original file.​

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