Vacuum Brake Booster Check Valve: Service and Repair

34 33 051 Replacing Nonreturn Valve For Brake Booster







Necessary preliminary tasks:
- Remove left cowl panel cover
- Remove intake silencer housing

Before beginning repair work, fully press the brake pedal several times to reduce the vacuum pressure in the brake servo. This makes it easier to pull off the vacuum line.
Non-return valve and moulded hose are permanently connected and are replaced together as a single unit.







Remove non-return valve (1) from brake servo.

Installation note:
Check gasket in brake servo and replace if necessary.







Remove line clip (1).
Detach snap fastener (2) and unfeed vacuum line with non-return valve.