34 33 071 Replacing Vacuum Hose For Brake Booster (N62)
WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.
Necessary preliminary tasks:
- Read and comply with General Information . See 34 00 ... GENERAL INFORMATION .
- Remove design cover . See REMOVING DESIGN COVER (N62) .
- Remove air-mass flow sensor . See 13 62 560 REMOVING AND INSTALLING/REPLACING AIRMASS FLOW SENSOR (N62) .
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.
Non-return valve and PA pipe are welded together and are replaced together as a single unit.
Remove microfilter (1).
Release screws and remove cover (1).
Detach non-return valve (2) from brake booster.
Installation:
Check seal in brake booster and replace if necessary.
Make sure cover engages properly.
Unfasten hose clip (1).
Detach PA pipe (2) with molded hose from vacuum pump.
Installation:
Replace hose clip.
Unclip holder (1).
Disconnect tank vent line at quick-release coupling (2) and lay back over vacuum line.
Feed out vacuum line (3) upwards by turning.