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:
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.
Unclip vacuum line (1) from line clip (2).
Unlock snap fastener (3) and detach vacuum line.
BMW X3 Owners Manual > Replacing components: Vehicle features and options
This chapter describes all standard, country-specific
and optional features offered with the
series. It also describes features that are not
necessarily available in your car, e. g., due to
the selected options or country versions. This
also applies to safety-related functions and
systems. The ...