The BMW marque had a good 2012, with sales of most models improving on their 2011 efforts. China has been a major factor in recent years as it has for many car makers. For 2012 the improvement in the US was positive also. However, nearly 44,000 people lost all sense of reason and bought an X6! Only two models went backwards, the 7 Series and Z4 (picture below).
As for BMW engines, 1,036,000 were built in Steyr, Austria; 396,000 in Hams Hall, UK (c. Birmingham); 388,000 at Munich, Germany and 42,000 in Tiexi, China. The engines are made for the BMW group as a whole.
Thanks to BMW for the data.