The fact the 1M will be a one year, one off car only has nothing to do with the engine in my mind. The X1 and 1 series are both produced on the same line in Leipzig. And since the X1 is so massively popular in Europe they are actually exceeding production to meet their demands for it there. This is why they delayed the release for the X1 in the US from this late summer/early fall to next year (excessive popularity in Europe). When the X1 comes to the US (2012) the 1M will be done. We now know this will be in Janurary.
'13 328i Coupe