Variant Code Structure

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The four digit structure of the variant code is a two word hex code. Each hex character provides specific control module encoding information

Fig 1: Identifying Variant Code Structure

Courtesy of BMW OF NORTH AMERICA, INC.

Each hex digit has a binary equivalent that provides four 1s or Os. This provides a total of 16 bits of information (or choices).

The control module assigns specific functions, characteristic maps and control module program constants based on the individual 1s and Os.

Fig 2: Identifying Variant Code Map Definitions

Courtesy of BMW OF NORTH AMERICA, INC.

Intentionally miscoding a DME will not create any performance advantages and quite possibly could lead to engine damage.