May 2013 Trivia Post published:May 9, 2013 Post category:Trivia BMW is changing the numbering system: Series 1, 2, 3, 4 etc. So what does this mean? Even numbers were two door; odd numbers were four doors. Read more articles Previous PostApril 2013 Trivia Next PostJune 2013 Trivia You Might Also Like October 2014 Trivia October 14, 2014 March 2014 Trivia March 28, 2014 April 2013 Trivia April 11, 2013