Bosch BOSCH PCR 2.1 VAG — online firmware checksum recalculation. Compatible vehicles: Audi, Seat, Skoda, Volkswagen. 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 — after a calibration edit the firmware checksum must be recalculated, otherwise the unit may reject the file.
This unit is found on дизельных vehicles Audi, Seat, Skoda, Volkswagen (2012–2023) — a total of 7 models, among them Audi A3 BlueTDI, Volkswagen Passat BlueTDI, Skoda Superb, Seat Leon, Audi A4 BlueTDI, Audi Q3 TDI, with power output of 150–190 hp
Recalculation is needed after any calibration edit — Stage 1 (190 → 235 hp / 400 → 480 Nm), Stage 2 (с downpipe — 250 hp), AdBlue/SCR off (BlueTDI = AdBlue car), DPF off (физический + калибровочный), EGR off, NOx sensor adapter, DTC removal (P204F, P1AAF), Speed limiter off, Hot start fix, Throttle response improvement: 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.