Another Web site showed the 3 Series Touring will have a diesel option in the 2nd half of 2013. Not sure how legitimate this is.
The slide you see below was reportedly taken during a BMWNA meeting and it reveals the upcoming diesel model lineup and schedule:
• F30 3 Series sedan diesel - first half 2013
• F31 3 Series touring - second half 2013
• F10 5 Series diesel - third quarter 2013
• X5d diesel - end of 2013
• 7 Series diesel - first half 2014
• X3d diesel - first half 2014