Replacing Vacuum Hose for Brake Booster

34 33 071 - Replacing vacuum hose for brake booster (N73)





Necessary preliminary tasks:
- Read and comply with General Information Service and Repair.
- Remove front design cover
- Remove resonance elements on left and right

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.





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).
Disconnect plug connections (2).
Detach holder (3) from vacuum line.

Installation:
Replace hose clip.





Detach quick-connect couplings (1) on tank vent valves and line connection.
Unclip purge air line (3) from holder (2) and remove.





Detach holder (1) and feed out vacuum line (2) by twisting upwards.