### [【Software】BAVCalc Universal Calculator for IMMO, AIRBAG, RADIO, ECU, BSI, and BCU](https://www.vwodis.com/en/article/14158.html)

**Published:** 2026-10-06T13:05:58

**Author:** admin

**Excerpt:** BAVCalc Universal Calculator is a classic offline unive…

BAVCalc Universal Calculator is a classic **offline universal code value calculator** in the automotive repair industry, integrating six core modules: **IMMO (anti-theft), AIRBAG (airbags), RADIO (in-car radio), ECU (Engine Control Unit), BSI (Body Control Module), and BCU (Control Unit)**

### Module Descriptions

1.  **IMMO (Immobilizer)** Reads EEPROM dump files and calculates vehicle immobilizer PIN codes offline. Supports models from Volkswagen Audi (VAG), Peugeot Citroën (PSA), Renault, Ford, Nissan, Opel, Fiat, and other models; used for key programming and anti-theft data repair.
2.  **AIRBAG (Airbags)** Repairs airbag ECU collision data and clears crash records; supports processing of airbag ECU dump files for VAG, Peugeot, Citroën, Alfa Romeo, and other models.
3.  **RADIO (Car Radio)** Enter the radio serial number to calculate RCD/RNS and other head unit unlock codes offline; with support for head units from Alpine, Lansdowne, Bosch, Volkswagen, Audi, BMW, Peugeot, and more.
4.  **ECU (Engine Control Unit)** VAG MED9.x, Renault, and Citroën ECU anti-theft data processing, PIN code extraction and calculation; performed locally without an internet connection.
5.  **BSI (Peugeot-Citroën Body Control Module)** PSA (French-brand) BSI computer dump analysis; reading/calculating anti-theft PINs stored in the BSI; body data repair.
6.  **BCU (Body Control Unit)** Data analysis for BCUs in Fiat, Alfa Romeo, and other models; extraction of security codes and repair of body EEPROM data.

### Software Information

-   Operating Systems: Windows XP / Win7 / Win10 / Win11
-   Operating Mode: **Fully offline local processing; no internet connection required**
-   Purpose: Diagnostic computer repair, in-vehicle infotainment system unlocking, anti-theft key pairing, airbag control unit reset, and body control unit data repair

**Tags:** BAVCalc_en

**Categories:** Other Software, Other Vehicles

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