Hello, i live in Norway and want to swap a n46b20 --------> n53b30 (e90).
Can you tell me what the Statens Vegvesen would say about that?
I'm wondering how much paperwork i would have to do.
Im adding a pic from bimmerforums.com where someone says you can swap antyhing you want as long as the car has been registered here for 10 years??? (I don't plan to swap brakes though)
In my country you can freely cross swap engines that came with the chassis ( for example E46 318-320-323-325-328-330) and you only need certificate/project if you plan to swap something from another car.