im curently changing out my ecu with a used one that i have found. but the numbers on top are different but only slightly. the ecu that is currently in my car (factory) reads N351 18 881 and the numbers underneith those read 079700-2253 while the new one i have reads n351 18 881r with the numbers under those reading 9707979 - 225 any help would be nice i dont wanna fry something .

 

N351 for N351, direct swap, no worries

 

the one with the R is a rebuilt unit, and is perfectly interchangable.