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34 33 071 Replacing Vacuum Hose For Brake Booster (N52K)

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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 vacuum hose. Vacuum hose and non-return valve are welded together and are replaced together as a single unit.

Necessary preliminary tasks: 

Detach partition wall seal upper section (1) in direction of arrow.

Remove non-return valve (2) from brake booster.

Fig 1: Remove Non-Return Valve (2) From Brake Booster
G00496769Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Check seal for non-return valve and replace if necessary.

Unlock quick-connect coupling (1) and detach vacuum line.

Fig 2: Unlock Quick-Connect Coupling (1)
G00496770Courtesy of BMW OF NORTH AMERICA, INC.