Foxflash Failed to Write Opel MD1CS003 ECU?

By | October 24, 2025
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Problem:

Foxflash is unable to write a Bosch MD1CS003 ECU from Opel Corsa 2021 on bench mode. Read ok, write failed.

foxflash-fail-to-write-Opel-MD1CS003-ecu-1

foxflash-fail-to-write-Opel-MD1CS003-ecu-2

foxflash-fail-to-write-Opel-MD1CS003-ecu-3

Solution:

This Bosch number is 0 281 037 101. 037 you cannot do it with Foxflash, even KESS3/Flex. It is locked.

034/035/036 versions are possible to read and write on bench mode. 037 is not possible.

foxflash-fail-to-write-Opel-MD1CS003-ecu-4

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