Ecu change

[Plusta88]

Hi any body ever changed the ecu iv got a insignia 2.0 diesel eco flex it currently has no ecu iv got some 1 who’s got a insignia he’s breaking and has 1 for me so just wounded if it’s simple before I buy he said it’s got a remap on it don’t no if that makes any problems tho I said I can reprogram with my op com is this true any help would be much appreciated