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VAG IMMO Calculator Software for Working With VAG Immobilizers of the 4th, 5th and 6th Generation
VAG IMMO Calculator package are designed for professional work with VAG group immobilizers. The software provides VAG PIN code calculation, IMMO data extraction, key decoding, and other essential functions for diagnostic specialists and VAG key programming.
It supports EEPROM reading, block cloning, and data export from different modules, making it one of the most versatile solutions on the market.

Main IMMO Calculator Modules and Features
The basic set of VAG IMMO Calculator includes key modules for working with control units of various VAG generations. Each module performs its own function
VAG: MEDC17 Immo
- Supported ECU types: MED17/EDC17 with immobilizer versions 4 and 5.
- Full access to all immobilizer-related EEPROM data. For ECUs equipped with on-chip SHE/HSM cryptomodules, modification of the CS value and complete transfer of immobilizer data is not possible.
- Options include immobilizer deactivation and status adjustment for Immo 4 units, as well as status modification for Immo 5 units.
- Import and export of data, including cross-unit transfers (e.g., Passat CCM comfort module).
- ECU cloning for Immo 4 and Immo 5 systems.
- Import of Immo 4 data from VVDI, SMOK, CARPROG files, and Immo 5 data from VVDI.
VAG: PCR2.1 Immo
- Editing of all immobilizer data stored in EEPROM.
- Data import/export, including compatibility with other modules (e.g., Passat CCM).
- ECU cloning functionality.
- Support for importing immobilizer data from VVDI, SMOK, CARPROG.
VAG: CCM Immo
- Full editing of immobilizer parameters.
- Ability to change the module status.
- Data import/export, including compatibility with units such as MED17.
VAG: BCM2 A4, A5, Q5
- Support for BCM2 units with both internal and external EEPROM.
- Editing of all EEPROM-stored immobilizer data.
- Configuration editing for installed components.
- Export of immobilizer data.
- Correction of ELV error 02811.
VAG: MED9 No Crypt
- Supported ECUs: MED 9.1, MED 9.5.10.
- Editing of all immobilizer-related EEPROM data.
- Import/export of data, including interoperability with modules like Passat CCM.
- ECU cloning supported.
- Importing immobilizer data from VVDI, SMOK, CARPROG.
VAG: EDC16 Immo
- Full access to all immobilizer data stored in EEPROM.
- Import/export of data, including exchange with other control units (e.g., Passat CCM).
- ECU cloning capability.
- Mileage correction.
- Support for data import from VVDI, SMOK, CARPROG.
VAG: PPD 1.x Immo
- Editing of complete immobilizer data contained in EEPROM.
- Export/import capabilities, including cross-module transfers (e.g., Passat CCM).
- ECU cloning.
- Support for importing data from VVDI, SMOK, CARPROG.
VAG: AUDI ELV Immo
- Editing of all immobilizer-related parameters.
- Import/export of data, including compatibility with Audi BCM2 modules.
- Module cloning support.
VAG: MM 7GV Immo
- Editing of all immobilizer data stored in EEPROM.
- Data export/import, including interactions with modules like Passat CCM.
- ECU cloning available.
- Compatible with data imports from VVDI, SMOK, CARPROG.
VAG: MM 9GV Immo
- Full editing of all EEPROM-based immobilizer data.
- Import/export of data, including transfers from other units (e.g., Passat CCM).
- ECU cloning supported.
- Import of Immo 4 data from VVDI, SMOK, CARPROG, and Immo 5 data from VVDI.
VAG: AUDI A6/Q7 EZS Immo
- Editing of all immobilizer-related EEPROM data.
- Export of immobilizer data.
VAG: EZS Crafter Immo
- Editing of all EEPROM-stored immobilizer parameters.
- Export of immobilizer data.
The package includes a security USB dongle. Additional modules and extensions can be activated on this dongle, allowing you to expand the software’s functionality and customize it to your specific needs.
Important:
This function is available only on certain BMW engines and is NOT applicable to other vehicle brands.
The information below applies only to stock engines with factory ECU software and a standard exhaust system.
What This Parameter Actually Represents
This is NOT a direct measurement of fuel octane and is NOT a direct octane reading calculated by the ECU.
The value is an adaptation factor ranging from 0 to 1, where:
- 0 = no correction
- 1 = maximum correction
According to BMW’s internal definition:
Faktor adaptierte Kraftstoffqualität (0 = ROZ98 / 1.0 = ROZ91)
- 0 corresponds to 98 ROZ
- 1.0 corresponds to 91 ROZ
ROZ is the German equivalent of RON (Research Octane Number).
The device converts this multiplier into a more intuitive octane value for user convenience.
⚠️ The device does not measure anything itself.
It only displays the data provided by the engine control unit (ECU).
How the ECU Evaluates Fuel Quality
Each ECU has different calibration sensitivity:
- Sensitivity to the adaptation factor
- Sensitivity of the knock control system
Fuel quality is evaluated subjectively by the ECU, primarily based on:
- Knock ignition timing corrections
- Overall engine noise levels
BMW G-Series & LCI F-Series (B-Engines)
B38 / N63 / S63 / N74
These engines are highly sensitive to octane adaptation.
- During warm-up and cruising, the displayed octane may frequently drop to 95 or lower.
- This does NOT automatically indicate poor fuel quality.
- Under load, the value should increase.
⚠️ If the value continues to decrease under load, this may indicate a problem.
B46 / B48 / B58
These engines have low sensitivity.
- During cruising, octane will typically display maximum values even with mediocre fuel.
- Under load, the value will decrease if fuel quality is truly poor.
S58
Octane correction is virtually inactive.
- It will typically always show 98.
- If it drops below 98, fuel quality is genuinely very poor.
BMW F-Series (Pre-LCI) with N/S Engines
Most pre-LCI F-series ECUs do not calculate octane adaptation.
Do not expect this parameter to function.
S55
- Octane parameter not used by the system
- Display not supported
- However, display of the last 5 refueling quality events is supported
S63
- Octane parameter not used
- Display not supported
- Refueling quality display not supported
BMW E-Series
Octane parameter not available. Display not supported.
Important Notes About Tuned Vehicles
With modified hardware or custom tuning, behavior may vary significantly. Always consult your tuner regarding expected operation.
Key principles:
- If octane drops under load, it means fuel quality is worse than expected under those conditions.
- This does NOT automatically mean the fuel itself is bad.
Examples:
- If a tuner increases ignition timing and boost pressure, even good fuel may cause knock corrections, and the ECU may interpret it as poor fuel.
- Thin-walled or poorly mounted exhaust systems may create parasitic noise, which the ECU may interpret as engine knock, causing negative correction.
- Conversely, if knock sensitivity is reduced or octane correction is disabled in tuning, readings may appear ideal while actual engine safety is compromised.