Engine identification

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Engine number at the marked surface.

Replacement drives are already assigned a number containing the identification and engine number at the factory.

The old drive number must be imprinted for replacement crankcases.

Magnesium crank cases feature a label, the engine number does not need to be embossed.

N20/N26:

Fig 1: Engine Identification (N20/N26)

Courtesy of BMW OF NORTH AMERICA, INC.

N55:

Fig 2: Engine Identification (N51/N52/N52K/N52T/N53/N54/N55)

Courtesy of BMW OF NORTH AMERICA, INC.