prone to CEL? meh, thats new to me, however, first thing you want to do, if you really care, is just make sure your car has had the service maintence and that it isnt overdue, if it is, do it, then you should be ok.. is that what you were asking, or were you asking in terms of modifications? if you want to modify it, just a good place to start is change ur tail lights and corner lights so they dont have any orange in them, trust me it looks much better.. ^^ look at his signature