Depending on the vehicle configuration, BMW E36, E46 and E39 models can use different Bosch engine management systems, including MS41, MS42 and MS43. The exact ECU version should therefore be identified before a file is prepared.

This work concerns calibration of the so-called popcorn limiter. It changes engine behaviour near the rev limit and does not, by itself, guarantee an increase in power.

The software should be selected for the specific engine, control unit and vehicle setup. There is no single power figure that applies to every BMW configuration listed here.