How to Use Xhorse VVDI MLB Tool with XDMQBAGL MQB48 Adapter?

Xhorse VVDI MLB Tool released MQB48 NEC35XX immo data collection function without disassembling the instrument but only the key. Follow the steps below to update your VVDI MLB Tool firmware and calculate immo data along with the MQB48 adapter.

Part 1: How to Modify VVDI MLB Tool to use with MQB48 adapter
Part 2: How to collect immo data with MLB Tool

Part 1: Modify VVDI MLB Tool Hardware

The MQB48 adapter comes with solder wires and an enhanced version replacement chip.

Remove 4 screws on the back of the MLB tool and open the shell.

Remove 2 screws on the main board and check out the other side.

This is the front of the main board.

Replace this chip (Flash 25Q128) using the enhanced replacement chip in the package.

After replacing the chip, reinstall the VVDI MLB Tool.

Part 2: How to Collect IMMO Data with MLB Tool

Run VVDI MLB Tool software. Choose MQB48 function and check wiring diagram.

Select the corresponding wiring diagram. Here the key board is the same as type 5.

Need to solder 2 wires, black wire and red wire.
Remove a capacitor, the solder the red wire (near the IC position).

Open the original key shell.

Remove a capacitor as shown in the wiring. Then solder two wires.

Connect Xhorse XDMQBAGL MQB48 Adapter with MLB Tool.

Connect Key board with MQB48 adapter. Place the key to coil of MQB48 adapter in the vertical direction.

NOTE:

The MQB48 adapter has strict power supply requirements during data collection. Use two separate USB cables to power the MLB main unit and the MQB48 collector. Do not use charging adapters.
The MLB main unit does not require 12V power.
Then connect MLB Tool with PC via USB cable.

Read key information. Read Key ID successfully.

Press Collect Key data.

Collecting key data and calculating immo data.

Calculation finished. Restore key back to original status. Save MQB NEC35XX immo data.

Data Collection Time:
Good power supply: ~15 minutes for data collection, ~1 minute for immobilizer data calculation.
Average power supply: ~30–60 minutes for data collection, ~1 minute for calculation.

Resolder the capacitor back to the key. Reinstall key shell. This is very important !!!

NOTE:

Removing the wrong capacitor can cause the MQB chip to become unrecognizable, making it impossible to collect data.
After reading the data, the capacitor must be restored; otherwise, the key cannot be programmed to car.

If need to connect MLB tool with key tool plus to collect immo data with tablet, make connection like this:

Note: Tablets with a single Type-C port have poor power stability, leading to longer collection times and lower success rates. Strongly recommend using a PC.