BMW G Series BDC2 Module Virgin and Replacement by APPRO2

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The APP2 APPRO2 Key Programmer offers multiple functions for BMW G-Series BDC2 modules, including new key adding, mileage reset, and module cloning/replacement. In this guide, we’ll demonstrate the complete process for virginizing or replacing a BDC2 module using the APPRO2 device.

After we obtain the ECU data through preprocessing, we can then erase or replace the current module.

Erase/Virgin module: Use the current ECU module to perform erasing. After erasing, new data can be written.

Replace module: Read the BDC2 module data (original module) that needs to be replaced and write it into to the module that has been erased (target BDC2).

Main steps:

Step 1: Connect to vehicle

Step 2: Backup coding

Step 3: Pre-process module

Step 4: Replace G-BDC

Step 1-3 are similar to adding key process. Refer to the guide below to operate.

Note:

This function is used to write the vehicle’s original data into a new module. Preparations are as follows:

1.Original Data Module:

Read the original GxxBdcData file in advance through preprocessing.

Prepare a working key to replace the module.

2.New Module:

Read the GxxBdcData file of the new module through preprocessing.

The file is used for the new module erasing.

If the new module has already been erased beforehand, preprocessing is not required.

How to virgin/erase the new module?

(Required before writing new data.)

Ensure the new module is connected.

Load the GxxBdcData file (obtained from preprocessing).

Select “Erase New Module”

Click “OK” to reset the BDC module

Wait for confirmation: “Erase BDC2 Module Completed.”

How to clone/replace the BDC2 module?

Make sure the current new (virgin) module is connected, and fully erased.

Select “Load Original Module Data” (from the original BDC2).

Place the working key on the APPRO2’s coil to obtain the password.

Select “Write Data into New Module”

Confirm the data info. is correct

Wait for confirmation: “Write Data Completed.”

Once cloning is done, install the new BDC2 module into the vehicle.

Important Notes

 The target module must be fully erased before writing.

 Preprocessing is mandatory unless the new module is already virgin.

 A working key is required for authentication during cloning.

 Ensure stable power to avoid interruptions during the process.

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