Inspection Instruction
WARNING: This page is about a different variant/trim than selected.
Special tools and workshop equipment required
- Brake Servo Tester: VAS6721
In case of complaints about the brake booster or a so-called >>hard brake pedal<<.
The following components are included in the check:
- Brake booster. Refer to OVERVIEW - BRAKE BOOSTER/BRAKE MASTER CYLINDER
- Seal between the master brake cylinder and the brake booster. Refer to OVERVIEW - BRAKE BOOSTER/BRAKE MASTER CYLINDER
- Check Valve
- Vacuum hoses with connectors
- Vacuum pump (if equipped). Refer to VACUUM SYSTEM .
The geographic location will influence the measurement results. The higher above sea level, the lower the air pressure.
Note the test requirements:
- Visually inspect all of the vacuum hoses for damage (for example, tears or damage caused by animals) and secure fit
- Maintain clean working conditions when working on the vacuum system
- Clean the engine compartment before starting work, if necessary