Hi everyone,

I'm a NOOB when it comes to ECU editing and I need some advice from more experienced users on how to safely revert a Bosch MED9.1 ECU (VR6 engine) back to stock. (03H906032AB_1086 / SW: 1037387767 / HW: 0261S02349)

Car has very rich idle (both lambdas around -25%, specified & actual pressure on rail gradually decreases to 20bar as the temperature increases) with no fault codes at all.

My current file is an OBD read using Kessv2, I managed to get a supposedly original file. Both files have the exact same size and mostly match, but looking at the differences leaves me with some doubts.

My main question is: Is it safer to flash the downloaded original file directly via OBD (Kessv2), or should I manually restore the stock values in my OBD read by only modifying the map areas?

Im attaching raport below with differences between mine an ori software.

Thanks in advance for any help, tips and advices.

If it was downloaded automatically, yes... you may flash it, except if it was a revo or APR file, wich sometimes mess with eeprom

Its MED 9.1.3 to be exact, and ori ecu file that one of users provided me is same size. But i'll read it once again and upload it.