Summary: In the confusing model shifts of BMW, 3 Series lost two doors and became the 4 Series, and the 1 Series became the all-new 2 Series, which debuts at the 2014 Detroit auto show.
Summary: In the confusing model shifts of BMW, 3 Series lost two doors and became the 4 Series, and the 1 Series became the all-new 2 Series, which debuts at the 2014 Detroit auto show.