Vacuum Brake Booster Check Valve: Service and Repair

34 33 051 - Replacing non-return valve for brake booster





Necessary preliminary tasks:
- Remove battery container Removing and Installing/Replacing Battery Container.
Before beginning work, fully press the brake pedal several times to reduce the vacuum pressure in the brake booster. This makes it easier to detach the vacuum hose.
The non-return valve and the moulded hose are permanently connected to each other are replaced together as a single unit.





Remove non-return valve from brake booster.

Installation:
Check seal in brake booster and replace if necessary.





Unclip line from holder (1).





Release line from intake manifold and disconnect.





Remove grommet from line.