M.A.P. Based – The N54 is a M.A.P. based system.
DME – The DME (Digital Motor Electronics) is BMW's term for what is commonly known as the “ECU”
Bank 1 / Bank 2 – BMW uses this terminology to describe the front three and rear three cylinders.
Bank 1 being the front three cylinders and Bank 2 being the rear three cylinders.
Closed-Loop Operation – BMW's DME operates in a constant closed-loop state, constantly
utilizing the A/F values in its tables and making adjustments via its equipped wide-band O2 sensors.
Boost Control – The BMW DME does not target boost but rather engine load. Engine load is
calculated based on pedal position, air flow/boost and RPM.