Master Cylinder

Master Cylinder

Special tools, testers and auxiliary items required

• Hose clamps up to 25 mm dia. (3094)

• Torque wrench 5-50 NM (VAG 1331)

• Brake filler/bleeder unit (VAG 1869)

• Brake filler/bleeder unit suction adapter (VAG 1869/4)

• Brake charger/bleeder unit (VAS 5234)

Removing

- Note or request the radio code on vehicles with coded radios, if necessary.

- Disconnect the battery..

Diesel Vehicles

- Disconnect electrical connector - 1 - and remove the rear spring hose clamp from the intake hose.





- Remove the spring hose clamp - arrow - and remove the hose from the air filter housing.





- Remove bolt for the air filter housing - arrow -.





- Move the air filter housing upward out of the brackets and remove.

Continuation for All

- Remove the battery..

- Remove the battery carrier.

- Place sufficient lint free cloths in the area of the engine and transmission.

- Extract as much brake fluid as possible from the brake fluid reservoir using the (VAS 5234) or (VAG 1869/4).

With Manual Transmission

- Clamp the clutch master cylinder supply hose - B - using (3094).

- Remove the supply hose - B - for the clutch master cylinder.





Continuation for All

- Disconnect electrical connector - A - from the floating warning indicator sensor.

Vehicles with Brake Light Switch on the Master Cylinder

- Disconnect the electrical connector - 1 - from the brake light switch.





Continuation for All

- Remove the brake fluid reservoir, press the engagement straps toward the outside at the reservoir and simultaneously pull the brake fluid reservoir out of the sealing plugs.





- Remove the brake lines - 1 - from the master cylinder, seal brake lines using sealing plugs from sealing plug repair kit (1H0 698 311 A).

- Remove nuts - 2 - for the master cylinder.

- If present, remove the heat shield.

- Carefully remove the master cylinder out of the brake booster.

Installing

- Installation is performed in the reverse sequence.

Observe the following points when installing:

- When installing the master cylinder to the brake booster, make sure that the push rod is correctly located in the master cylinder.

- Connect the battery..

- Bleed the brake system. Refer to --> [ Brake System, Bleeding ] Brake System, Bleeding

Tightening Specifications