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11 61 730 BMW Leak Test For Intake System (N54): Notes

IMPORTANT: Overpressure and vacuum lines are identified by the size of the seals and color-coded Red and Blue and must not be mixed up with each other.
Build up pressure with Blue color.
Generate vacuum pressure with Red color.
Mixing up the functions will result in damage to the engine.

Necessary preliminary tasks: 

Note on ordering: