Bosch M1.5.5 — online firmware checksum recalculation. Compatible vehicles: Alfa Romeo, Chevrolet, FIAT, Holden. Upload MOD and ORI — result in a second, preview is free.
The plugin is already selected. Upload your MOD and ORI firmware — you'll get the result in a second.
Bosch M1.5.5 — after a calibration edit the firmware checksum must be recalculated, otherwise the unit may reject the file.
This unit is found on бензиновых vehicles Alfa Romeo, Chevrolet, FIAT, Holden, Opel, Saturn, Vauxhall (1997–2004) — a total of 39 models, among them Alfa Romeo 145, Chevrolet Astra, FIAT Bravo, Holden Astra, Opel Astra, Saturn Astra.
Recalculation is needed after any calibration edit — Stage 1, Stage 2, Stage 3, Pop & Bang / decat, Launch control, Speed limiter off, OPF/GPF off, Lambda off, DTC removal, Cold start fix: the checksum no longer matches, and the ECU throws an error or refuses the firmware.
Upload the modified file (MOD) and the original (ORI) — the tool compares them, finds the affected regions and recalculates only the required checksums, leaving the rest of the calibration untouched. The result is ready in a second and free; downloading the fixed .bin requires registration in the portal.
Other checksum plugins from the same manufacturer — open any of them to recalculate the checksum.