OBDSTAR BMW B48 B58 ECU Unlock Function is Ready

 OBDSTAR BMW B48/B58 (Bosch MG1CS201/MG1CS024) encrypted ECU unlocking feature is officially launched on July 28th, 2026.

 

Supports
Bosch MD1CP032 (LOCKED)
Bosch MG1CS024 (LOCKED)
Bisch MG1CS201 (LOCKED)

Diesel MD1CS089 ECU coming soon.

Here obdii365.com has collected some frequently asked questions from our customers.

Q: What OBDSTAR device supports MD1 MG1 unlocking, and what adapter to use?

A: OBDSTAR X300 Classic G3 with ECU license/DC706 + MPp001 + C4-06 adapter and ECU Master + C4-06 adapter.

Use C4-06 basic kit, no need to be full kit.

 

Q: Do I need to pay separately to unlock this feature?
A: As long as the device is within the subscription, this feature can be updated online for free. No separate authorization is required.

 

Q: ECU need to be opened?
A: Yes, need to open ECU and solder the corresponding pins, then unlock in boot mode.

Q: After OBDSTAR unlock, can the ECU be read/written with other programming tools?
A: No, it can only be read and written with OBDSTAR tools.
After the operation is completed and exited, the ECU will automatically return to the locked state.

 

Q: Does it support BMW ISN reading and modifying?
A: Only supports BMW ISN reading function. ISN modifying is still under development.
Now supports reading and writing ECU eeprom & flash and also does checksum correction for flash.

 

Q: Also unlock diesel MD1CS089 and MD1CC878 unlock?
A: Supports MD1CS089 unlock. Software is coming soon. MD1CC878 is not yet supported.

Q: Is there any special adapter for MG1/MD1 locked ECUs?
A: OBDSTAR will be rolling out wiring adapters for MG1 and MD1 over time. For now, they have a dedicated harnesses ECM-003 available for B48 and B58.
To connect ECM-003 adapter to the DC706/G3, you will need a bench converter or the P004.

To connect ECM003 to the ECU MASTER, you will need the Bench-D-V1 adapter.

 

Q: Need to remove resistors?

A: Yes, wiring diagram will show which resistor needs to be removed. It’s a 0.1 ohm resistor.  The resistor is 0.1 ohms you can just bridge the two points if you loose it.

OBDSTAR BMW B58 ECU unlocking guide:

How to Unlock BMW B58 MG1CS024 ECU with OBDSTAR ECU Master?

OBDSTAR ECU Master Unlock BMW B58 MG1CS024 ECU

 The OBDSTAR BMW B48/B58 encrypted ECU unlock functionality is scheduled for release at the end of August, 2026. We’re providing an exclusive early preview of the BMW B58  (Bosch MG1CS024) ECU unlocking process.

 

Compatible devices:

OBDSTAR ECU Master/ X300 Classic G3 with ECU License/ OBDSTAR DC706

OBDSTAR RH850 C4-06 Adapter (basic kit)

Procedure:

Go to ECU Read/Write- Engine- Quick search 024 and select MG1CS024 locked ECU type. For locked ECUs, only boot mode is available.

Read connection instructions and check wiring diagram.

Connect ecu adapter with ECU master.

Connect the 3-in-1 jumper cable to the white power wire.

Follow pinout to connect 2x IG, GND, CAN-H and CAN-L wires.

Check PCB wiring diagram.

Follow diagram to remove a resistor.

Then solder C4-06-C01 black and red wires to the ECU board.

Since the OBDSTAR wires are a bit thick, it is recommended to use tape to secure the c4-06-01 board in place, to prevent the black and red wires from being accidentally pulled loose.

Connect C4-06 host adapter with ECU Master unit. Connect W010A to the C4-06-01 adapter.

Use the OBDSTAR’s included power supply to power the ECU MASTER.

Once everything is connected, click “Connect” in the software to begin the ECU unlocking process.

After the unlock is complete, you can then proceed to read the EEPROM and FLASH data; OBDSTAR also supports reading the ISN code.

OBDSTAR Update Bosch MD1 MG1 ECUs Unlocking

 

OBDSTAR will release breakthrough upgrade soon. This upgrade supports unlocking encrypted Bosch MD1 & MG1 ECUs.

 

Locked MG1/MD1 ECU
Read/Write & Unlock

 

Support following ECUs:

• Bosch MD1CP032 (BMW B57) TC299

• Bosch MG1CS024 (BMW B48/B58) TC298

• Bosch MG1CS201 (BMW B48/B58) TC298

• Bosch MD1CS069 (FCA) TC299

• Bosch MD1CP006 (Ford) TC298

• Bosch MD1CS089 (ISUZU etc.) TC299 (Only for ECU MASTER C)

• More Models Coming Soon…

 

Compatible devices:

• OBDSTAR DC706 with MP001
• OBDSTAR ECU Master
• OBDSTAR X300 Classic G3 with ECU license

Functions

• Read/Write Internal Flash
• Read/Write Internal EEPROM
• ECU Unlock
• Checksum Correction

NOTE: Requires RH850/V850 adapter kit (C4-06 adapter).

Only ECU Master HD pack C can unlock diesel MD1CS089 ECU.

 

How to Use OBDSTAR Li Auto C1032 Adapter?

 How to connect the OBDSTAR Li Auto C1032 harness adapter with BCM module and perform key programming with X300 Classic G3?

Remove the driver's side trim panel.



Unclip the retaining clips. Remove the cover panel.


Locate the BCM module.
Unplug the blue connector.


Insert one blue end of the C1032 cable into the vehicle's original blue socket, and plug the other blue end into the original port on the BCM.



The C1032 harness also has two black  OBD connectors — plug the male connector into the vehicle's OBD diagnostic port, and connect the female connector to the device's OBD cable.



Once connected, you can start programming the key.

OBDSTAR G3 MQB48 Cluster MP001 Connection Failed Solution

Problem:

Tried to read VW MQB48 cluster data for all keys lost using OBDSTAR X300 Classic G3 and C4-06 adapter. After setting up the connection as in the diagram, it says MP001 connection failed. Any solution?

Solution:

Reset MP001.

 

Solved. Reset device.

 

NOTE: 

Some users said you must connect the 12V charger directly to the MP001, not the OBD2 cable. This is not correct.

OBDSTAR engineer confirmed you can connect a 12V charger to either MP001 or OBD2 cable. Both work fine.

Toyota Camry 2022 Denso ECU IMMO OFF by OBSDTAR G3

How-to: step-by-step bench IMMO OFF for Toyota Gen3 Denso ECU using OBDSTAR X300 Classic G3 with ECU license.

 

Model Example: Toyota Camry 2022

 

Procedure:

1. Determine the ECU Generation & Chip

The process changes depending on your Camry’s model year:

Older Camrys (Denso/Delphi): Handled via standard EEPROM reading.

Modern Camrys (Gen 3 / Gen 4 systems) usually feature Toyota Gen 3 ECUs with R7F701216 processors or Denso Gen 4 processors.

 

2. Read and Backup original ECU Data

Connect your OBDSTAR G3 to the internet and ensure it is updated to the latest software version.

Power on the tablet and select ECU Advanced (or ECU Flasher / Clone depending on your license activation).

Select ECM – TOYOTA – Toyota Denso Gen3 ECM R7F701202- Bench Mode with MP001.

Click on Pinout / Wiring Diagram. Follow the precise on-screen schematic to hook up the 12V, GND, CAN-H, CAN-L, and ignition wires from MP001 adapter to the ECU pins.

Click Connect on the G3 screen to establish communication.

Click Read INT Flash (and Read INT EEPROM / DFlash if available).

Crucial: Save these original backup files safely to your tablet.

3. Apply the IMMO OFF Modification

Once backup files are securely stored, locate the IMMO OFF function menu under the Special Function options for your specified controller.

Select IMMO OFF.

The G3 will prompt you to select the original file you just read from the ECU.

The software will process the file, perform a checksum correction automatically, and generate a modified “Immo Off” bin file.

4. Write Data Back to the ECU

Select Write INT Flash (or Write EEPROM depending on the specific model’s IMMO architecture).

Select the modified “Immo Off” file generated in the previous step.

Keep power fully stable while the G3 writes data and verifies the blocks.

Once the application prompts Operation Success, select Disconnect, power down the MP001 adapter, and safely reinstall the ECU back into the Camry.

If your goal is instead just to bypass an All Keys Lost situation rather than deleting the immobilizer completely, you can read the Smart Key Box data via OBD instead.