Overview - Brake Booster/Brake Master Cylinder
WARNING: This page is about a different car, the 2022 Audi S3, 2022 Audi RS 3, 2022 Audi A3 Quattro, and 2022 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.
- Brake Line
- Brake master cylinder/primary piston circuit to hydraulic unit
- 14 Nm
- Brake Master Cylinder
- Cannot be serviced. If malfunctioning, replace as complete unit.
- Refer to BRAKE MASTER CYLINDER, REMOVING AND INSTALLING
- Brake Line
- Brake master cylinder/secondary piston circuit to hydraulic unit
- 14 Nm
- Plugs
- To install, coat with brake fluid
- Brake Fluid Reservoir
- Locking Pin
- Slide through the brake fluid reservoir and the master brake cylinder
- The locking pin must be pushed into the brake fluid reservoir tab.
- Brake Fluid Level Warning Switch -F34-
- Cap
- With gasket
- The seal is not available separately
- Nut
- Self-locking
- Replace after removing
- Refer to Fig 2
- Seal
- Replace after removing
- Brake Booster -NX6-
- with
- Brake Pedal Position Sensor -G100-
- Brake Pedal Position Sensor 2 -G836-
- Power Supply Sensor 1 -G730-
- Power Supply Sensor 2 -G731-
- Brake Booster Voltage Sensor -G822-
- Brake Booster Temperature Sensor 1 -G838-
- Brake Booster Temperature Sensor 2 -G839-
- Brake Booster Motor Position Sensor -G840-
- Brake Booster Control Module -J539-
- Electro-Mechanical Brake Booster Motor -V548-
The components in the brake booster cannot be replaced individually.
Check the function of the brake lamp after installation of the brake booster.
- Refer to BRAKE BOOSTER, REMOVING AND INSTALLING
- with
- O-Ring
- Replace after removing
- Nut
- 23 Nm
Brake Booster - Tightening Specification and Sequence
-- Tighten the bolts to 25 Nm in the sequence -3 and 4-.