Official OBDSTAR distributor · Configuration A
OBDSTAR ECU MASTER A
ECU programming and cloning for passenger cars and electric vehicles : ECU/ECM, TCU/TCM, BCM, BMS and VCU, depending on the application.
OBDSTAR ECU MASTER A is a professional PC-based interface for reading, writing, backing up and cloning compatible control units. It supports specialist workshops when replacing automotive and EV modules and transferring their data. Available functions depend on the exact control unit reference and software version.
Key features
- Cars and EVs: ECM/ECU, TCM/TCU, BCM, BMS and VCU, subject to coverage.
- Supported operations: Flash/EEPROM reading and writing, cloning, data transfer, checksum, VIN and virgin reset, depending on the module.
- Multiple connection modes: OBD, BENCH, BOOT or JTAG/BDM when specified by the procedure.
- Windows PC: software compatible with Windows 10 and later.
- Upgradeable platform: additional configurations can be added through paid activation.
What is it used for?
Replacing a faulty control unit, backing up data before a repair, transferring data and programming a compatible replacement module.
Check before purchasing
The module reference, the intended operation, the connection mode and any accessories specified in the procedure.
Which version is offered here?
This product page covers only Configuration A: passenger cars and electric vehicles. The motorcycle (B), heavy-duty vehicle (C), and airbag/battery/SAS reset (D) configurations require separate activations.
Passenger car applications
OBDSTAR coverage includes Bosch MED/EDC17, Continental SIMOS and Delphi families, as well as certain DSG, Aisin and ZF 8HP transmission modules. Listed applications include cloning certain BMW 8HP GEN3 TCMs in BENCH mode, transferring data on selected Volkswagen SIMOS/ME17/EDC17 variants, and reading/writing certain Ford MG1/MD1 GEN2 units via OBD or BENCH.
Please note: coverage of a control unit family does not mean that every variant is supported. Always check the hardware and software references and the intended operation.
Examples of functions, depending on the control unit
- Cloning: transfer data from the original module to a compatible replacement unit.
- Reading and writing: extract and back up Flash or EEPROM data, then write the appropriate data.
- Checksum: check or recalculate data integrity where the function is available.
- VIN and virgin reset: prepare certain replacement control units as part of an authorised repair.
Electric vehicle applications
Configuration A also covers applications on certain BMS (battery management system) and VCU (vehicle control unit) systems. OBDSTAR lists Bosch units found in Audi, Volkswagen, SEAT, Škoda, Geely and Great Wall vehicles, as well as certain SAIC and BYD applications. Cloning availability depends on the exact module reference.
Connection modes
OBD
Via the diagnostic port, where supported.
BENCH
Control unit removed and connected on the bench.
BOOT
Low-level access according to the module procedure.
JTAG / BDM
Direct connection for certain control unit families.
How does an operation work?
- Install ECU MASTER software on a compatible Windows PC, register the device and activate Configuration A.
- Look up the vehicle and control unit reference in the software coverage list.
- Follow the wiring diagram for the supported mode and use a suitable regulated power supply.
- Read the data and save a backup before making changes.
- Perform the available operation, write the data if required, then check that the module works correctly.
Package contents and specifications
The advertised package includes the ECU MASTER interface, a 14 V power supply, M001C main cable, USB cable, BENCH-C-V1 harness, C4-10 adapter, W004/W005/W006 cables and sets of jumper wires. Confirm the exact contents of the Keyfirst package before publishing or ordering, as bundles and accessories may vary.
Configuration
A · passenger cars and electric vehicles
Modules
ECM, TCM, body/chassis, BMS and VCU, depending on the application
PC and connection
USB · Windows 10 or later
Upgrade options
Additional configurations through paid activation
Subscription and updates
All ECU MASTER models include 12 months of updates after registration and activation. After this period, renewal is paid. Software already downloaded remains usable, while new downloads and updates require an active subscription.
Frequently asked questions
Can ECU MASTER A clone every control unit?
No. Cloning depends on the vehicle, module reference and software coverage.
Can I work without removing the control unit?
Yes, where OBD operation is supported. BENCH and BOOT procedures require a direct connection to the module.
Are motorcycle and heavy-duty vehicle functions included?
No. They are covered by Configurations B and C, sold separately.
Two-year European warranty
Your equipment is covered by a two-year warranty from Keyfirst, subject to the warranty terms applicable to your purchase.
The brand, model and manufacturer names mentioned are registered trademarks of their respective owners. They are used solely to identify compatible applications and do not imply any affiliation with those manufacturers.
For professional use on authorised vehicles. Back up the original data and follow OBDSTAR’s wiring diagrams and power supply requirements. Coverage and exact package contents may change: check the details when ordering.
Keyfirst has been an official OBDSTAR distributor for over 10 years. Our experience helps professionals select and get started with their equipment.
