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11 31... Determining intake camshaft variant (N20, N26)

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Necessary preliminary tasks: 

NOTE: Variant A:  X = approx. 8 mm
Variant B:  Y = approx. 4 mm
Fig 1: Identifying Intake Camshaft Variant
G09923274Courtesy of BMW OF NORTH AMERICA, INC.

Identify intake camshaft variant by means of mirror (1) on vacuum pump drive flange.

IMPORTANT: If variant A  is fitted, proceed with CHECKING INTAKE CAMSHAFT .
If variant B  is fitted, no further action is required. Install VACUUM PUMP .
Fig 2: Locating Intake Camshaft Variant By Means Of Mirror On Vacuum Pump Drive Flange
G09923275Courtesy of BMW OF NORTH AMERICA, INC.