1. The document provides information on BMW engine codes, specifications, and the models they were used in. It includes details on displacement, cylinder count, valve configuration, power and torque outputs, manufacturing dates, and more.
2. The engines are organized by their BMW engine code, with M10, M20, M30, M40, M42, M43, M44, M47, M50, M51, and M52 being some of the codes listed.
3. Each engine code has multiple variations specified by additional letters or numbers that indicate differences in displacement size or features.