Originally Posted by kbsilver
The engine itself might be the same as in Europe but the emissions controls to meet US requirements is all new. It is the added emissions contol that are causing these issues. The good news (if there is any) is the european emissions requirements will soon be about the same as the US. So in a way we helped BMW debug these systems for the european market.
KB, I do not disagree with your input. Couple of comments on it:
Emission regulations US and Europe are not comparable. Engine cycles are different, fuels are different, test requirements are different, vehicle classes definition are different.
Now, technology to control emissions is marching in paralell as all companies are global and exposed to both markets.
The challenge is not achieve the emissions standards or fuel consumption targets, it is to get there at a cost the market will digest.