My Lancer Oz 2002 Have ECU problem And I change for another one. The problem is that my ECU number star with MR and the one I buy is MN. I put it in the car and he start but now I have problem when the transsmision Change that do not take the fourth change. This has to be a problem involving the ECU? I found that the ECU start whit MN is from 2004 up Lancer. Can somebody help me?