Original OBDSTAR brand tools, including OBDSTAR X300 DP Plus, X300 Pro4, P50, Odomaster, X300M, DC706, Adapters and Test Platforms from obdii365.com.
DS4 MD1CS003 locked was successful unlocked with OBDSTAR DC706 and AdBlue deleted.
There is MD1CS003 Locked option to choose , you have to use MP001 and
RH850 C4-06 adapter to conncet to mainboard ECU.
Checksum was corrected by ObdStar.
Car runs fine. Resistor was removed to Read/Write and soldered back to place.
Some customers do not know how to connect/set up the OBDSTAR ECU Master/ X300 Classic G3/ DC706 devices to perform 2020.06- BMW MD1/MG1 ECU bench unlocking.
Here is the clue.
Method 1: ECM-003 Bench Connection
Tools used:
Connection Guide
Connect ECU Master with PC via USB cable.
Connect Bench DV1 cable to C3 connector of the ECU Master device.
Connect the other end of Bench DV1 cable to the ECM003 adapter.
Connect ECM-003 adapter to the ECU.
Connect the power supply to the ECU Master.
Ready to unlock, read and write ECU with ECU Master.
Method 2: Jumper cable connection
Tools used:
Connection Guide
Connect ECU Master with PC via USB cable.
Connect Bench jumper cable to the C3 connector of the ECU Master device.
Connect jumper cable to the ECU according to the wiring diagram.
Connect power supply to the ECU Master.
Ready to unlock, read and write ECU with ECU Master.
G3 and DC706 share the same connection method.
Method 1: Bench adapter connection
Tools used:
Connection Guide
Connect G3 or DC706 with MP001 programmer via main cable.
Connect converter V2 or P004 adapter with MP001’s C2 connector.
Connect ECM-003 adapter with converter V2 or P004 adapter.
Connect ECM-003 adapter to the ECU.
Connect power supply/battery stabilizer to the main cable.
Ready to unlock ECU on bench mode.
Method 2: Jumper cable connection
Tools used:
Connection Guide:
Connect G3 or DC706 with MP001 programmer via main cable.
Connect jumper cable to the MP001’s C2 connector.
Connect jumper cable to the ECU according to the wiring diagram.
Connect power supply/battery stabilizer to the main cable.
Ready to unlock, read and write ECU on bench mode.
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OBDSTAR released a new software update: MB FBS4 virginization now available!
Now you can perform:
Data Reading and Virginization
Personalization Data Transfer
Programming and VIN Writing
Supported Devices:
X300 Classic G3
DC706
ECU Master with passenger car package A
Supported Functions (OBD)
Data Reading
Virginization
Personalization data transfer
Programming
VIN Writing
Supported Types:
MB Benz Bosch ECM (FBS4) MED17.7.1 TC1797
MB Benz Bosch ECM (FBS4) MED17.7.2 TC1797
MB Benz Bosch ECM (FBS4) MED17.7.3 TC1797
OBDSTAR released a new upgrade: add more encrypted MG1/MD1 ECU unlocking models.
More supported models are now available!
Problem:
An OBDSTAR DC706 user was trying to clone a DME for a 2022 BMW X3. It’s an MG1CS201 locked ECU. He was able to unlock ECU with C4-06 adapter in boot mode, then read EEPROM, Flash data and ISN. He was able to write the EEPROM file to the donor unit. The problem is when he tried to write the Flash, it fails to erase sector 4 then quits. Is it possible to clone this module?
Here is the clue.
Not possible to clone/cannot directly clone.
There is OTP sector that you cannot write to.
This is the kind of job you reprogram ECU to car, not clone.
Only sync new DME.
The ISN needs to be transferred by obd2 (need both eeproms from original and donor). Then program afterwards with Esys. Need Windows laptop and Enet cable. Then adapt sync new DME via OBD2.
OBDSTAR DC706 MDG1 boot glitch unlocking new user report:
FCA Fiat Ducato Bosch MD1CS069 TC299TP unlocked! Success!
Requqires MP001 + c4-06 adapter.
In boot mode.
The connection diagram is inside the software.
Most important is checksum.
Checksum correction is automatically in writing flash.
OBDSTAR G3 and ECU Master will do the same.
OBDSTAR adds new OBD/bench mode support for Ford SID212 / SID212EVO/ SID213EVO ECUs on July 28th, 2026.
Added Ford Continental/Simens/VDO SID212/SID212EVO TC297 ECU
Added Ford Continental/Simens/VDO SID213EVO TC387 ECU
Technical focus
Function:
Read MAPS
Write MAPS
Checksum correction
This update applies to: OBDSTAR X300 Classic G3 with ECU license, DC706 + MPp001, and ECU Master.
Supported vehicle list:
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:
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.
