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Ecu Differences part numbers


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Im going to attempt swapping ECU's , does anyone know if there would be any issues if he part number is slightly different ?

My current one is or is supposed to be 89666 - 30371  , I may have access to 89666 - 30373 which is for models 04.2006-07.2006

Has anyone had any experience with ecu swapping ? any advice will be much appreciated 


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According to this is does exist , the later the model the number changes or is substituted if that what is meant by "SUBS"?

Im thinking it should work as it is the same car and i cant see much changes if any in any of the newer models . All MK3 GS 300



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