Quick intro
BAVCalc is a desktop utility for interpreting and editing automotive binary dumps used by SRS airbag modules, immobilisers, ECUs, dashboards and car radios. It helps with code calculation, crash data handling and configuration changes from saved EEPROM or flash files. Coverage spans multiple brands and module families.
Highlights
Package contents
Compatibility notes
Support focuses on earlier generation ECUs, SRS and dashboard EEPROM layouts found across European brands. Function availability can differ by dump version and supplier firmware. Vehicle coverage and outcomes vary by module hardware and software level.
Basic usage
Operating systems
Windows 7, Windows 8, Windows 10, Windows 11 in x86 and x64 builds
Minimum system requirements
Dual-core CPU, 2 GB RAM, 50 MB free storage, standard display, local administrator rights, offline capable; USB connectivity for your external programmer as needed
Disclaimer
Source of Files. All software and resources in this post are collected from public and open sources on the internet. We do not claim authorship or ownership.
File Hosting. This forum does not host files. All links point to third party public cloud storage. We are not responsible for external content.
User Responsibility. Software is provided for educational and evaluation purposes only. You use it at your own risk. Authors of the post and forum administration are not liable for any damage.

BAVCalc is a desktop utility for interpreting and editing automotive binary dumps used by SRS airbag modules, immobilisers, ECUs, dashboards and car radios. It helps with code calculation, crash data handling and configuration changes from saved EEPROM or flash files. Coverage spans multiple brands and module families.
Highlights
- Universal calculator modules for IMMO, AIRBAG, RADIO, ECU, BSI and BCU with a simple hex-view workflow
- Brand folders commonly include Alfa Romeo, Citroën, Fiat, Peugeot, Saab and VAG for airbag plus Citroën and Renault for ECU, with wider IMMO sets; availability varies by vehicle
- Works from offline dump files read by popular programmers then written back after calculation
- Fast lookups for legacy radio codes and immobiliser parameters reported by the tool
- Lightweight native Windows app suitable for field laptops
Package contents
- BAVCalc v1.2.5.13 application build
- Module databases for Airbag, IMMO, ECU and Radio
- ReadMe and usage notes
Compatibility notes
Support focuses on earlier generation ECUs, SRS and dashboard EEPROM layouts found across European brands. Function availability can differ by dump version and supplier firmware. Vehicle coverage and outcomes vary by module hardware and software level.
Basic usage
- Read the target module’s EEPROM or flash with your preferred programmer and save a backup
- Open the dump in BAVCalc and select the matching brand and module family
- Run the required calculator or data edit then review the preview values
- Save the modified file and program it back to the unit
- Verify operation on bench or in vehicle following standard safety practices
Operating systems
Windows 7, Windows 8, Windows 10, Windows 11 in x86 and x64 builds
Minimum system requirements
Dual-core CPU, 2 GB RAM, 50 MB free storage, standard display, local administrator rights, offline capable; USB connectivity for your external programmer as needed
Disclaimer
Source of Files. All software and resources in this post are collected from public and open sources on the internet. We do not claim authorship or ownership.
File Hosting. This forum does not host files. All links point to third party public cloud storage. We are not responsible for external content.
User Responsibility. Software is provided for educational and evaluation purposes only. You use it at your own risk. Authors of the post and forum administration are not liable for any damage.
