34 33 071 Replacing vacuum hose for brake booster (N63)

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Before beginning work, fully press the brake pedal several times to reduce the vacuum pressure in the brake servo. 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:

Read and comply with General Information.
Remove partition wall, units compartment

Pull off partition wall seal upper part (1) in direction of arrow.

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

Installation note:

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

Fig 1: Pulling Off Partition Wall Seal Upper Part

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Unclip vacuum line (1) from line clip (2).

Unlock snap fastener (3) and detach vacuum line.

Fig 2: Identifying Vacuum Line, Line Clip And Snap Fastener

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