TagFlash ECU Programmer is confirmed to read and write Opel Vivaro 2021 Md1cs003 on Bench, Adblue off, original tool, no reworked.
Image 1 shows the ECU of Md1cs003.

Image 2 shows TagFlash is writing Md1cs003 100% ok.

Image 3 shows Tagflash wiring diagram of Md1cs003.

Conclusion:
TagFlash ECU Programmer offers reliable and effective functionality for reading and writing Opel Vivaro 2021 Md1cs003 on Bench. The tool’s original design ensures seamless operation without requiring any modifications.