The Z4 has still got 2 more years of lifecycle no?

The Spartanburg plant wouldn't use one kind of 3.0 engine if the X5 went 3.0TT. The plant exports to all markets (worldwide) that get Z4's, X5's & X6's. So everything from 4 cylinder, 6 cylinder diesels and M engines go through it.

Not that the X5TT isn't around the corner. I have no idea on that, but one would assume that it isn't that far off.