[pmeloche]

The E?? and F?? codes are platform designations used by BMW internally. They are associated with a market designation. For instance, the E90 platform is known commercially as the 3 Series sedan. The E9x (E90, E91, E92, and E93) are respectively the 3 Series Sedan, Touring, Coupé, and Convertible.

The E in E?? stood for Entwicklung, which is german for "Development". When they reached the end of the E??, they switch to the letter F. The current generation 7 Series was the first F?? platform available to the public, as the F01 7 Series 750i. Assuming the M3 you are looking for is the current generation then it would be an E90 M3.

Hope that helps.