34 33 071 Replacing vacuum hose for brake booster (N62)

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Read and comply with General Information, refer to 34 00 ... GENERAL INFORMATION .
Remove lower section of microfilter housing, refer to 64 31 061 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT MICROFILTER HOUSING LOWER SECTION .
Remove engine acoustic cover.
Remove intake filter housing, refer to 13 71 000 REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING .
Remove air intake hose with air-mass sensor.

IMPORTANT: Before starting work, press the brake pedal to the floor several times to reduce the vacuum pressure in the brake booster. This makes it easier to remove the PA pipe. Non-return valve and PA pipe are welded together and are replaced together as a single unit.

Detach non-return valve (1) from brake booster.

Fig 1: Detaching Non-Return From Brake Booster

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Unclip vacuum line from fixture (1).

Unfasten hose clip (2).

Fig 2: Removing Vacuum Line From Fixture

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Installation:

Replace hose clip.

Release retaining clips (1) and feed out vacuum line (2).

Fig 3: Releasing Retaining Clips And Removing Vacuum Line

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