34 33 071 Replacing vacuum hose for brake booster (M54)

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IMPORTANT: Before beginning work, fully press the brake pedal 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.

Necessary preliminary tasks:

Read and comply with GENERAL INFORMATION .
REMOVE LOWER SECTION OF MICROFILTER HOUSING .

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

Fig 1: Identifying Brake Booster Non-Return Valve

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten hose clip (1).

Detach moulded hose (3) from PA tube.

Withdraw moulded hose (3) from fixture (2).

Installation:

Replace hose clip.

Fig 2: Identifying Hose Clip, PA Tube Moulded Hose And Fixture

Courtesy of BMW OF NORTH AMERICA, INC.