Hydraulic System, Post-Bleeding

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.

The brake system is divided diagonally.

Only perform if the brake pedal travel is too long, or the so-called >>soft brake pedal<<.

Special tools and workshop equipment required

Brake Charger/Bleeder Unit :VAS5234 with Brake Bleeder Adapter :VAS5234/1A
Wrench - Brake Bleeder Set :VAS5519
Brake Bleeding Tool Set :VAS6564

Procedure

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-- Fill the brake fluid reservoir with brake fluid up to the "MAX" mark.

-- Connect the :VAS5234 with Brake :VAS5234/1 (example photo).

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-- Set the correct pressure on the Brake Charger/Bleeder Unit. Refer to the Operating instructions from the VAS5234.

TIP:

For certain tire combinations the removal of the wheels is required.

-- Remove the protective cap from the bleed screw on the brake caliper.

Use a suitable bleeder hose. It must be seated tightly on the bleed screw so that no air can enter the brake system.
Pay attention to the operation manual for :VAS6860 !

-- Connect the hose -1- on the container.

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The help of a second technician is necessary for the following procedure.

Bleeding sequence

1 -

Left Front Brake Caliper

2 -

Right Front Brake Caliper

3 -

Left Rear Brake Caliper

4 -

Right Rear Brake Caliper

Bleed the brake caliper at each bleed screw. If the brake caliper has two bleed screws, bleed the outer screw first.

-- Depress the brake pedal forcefully and hold.

-- Open the bleed screw on the brake caliper.

-- Press the brake pedal down until it stops.

-- Close the bleeder screw with the pedal depressed.

-- Release the brake pedal slowly.

This bleeding procedure must be performed five times per brake caliper.

-- Repeat the bleeding procedure in the specified sequence for the remaining brake calipers.

-- Fill the brake fluid reservoir under consideration of brake pad wear up to the "MAX" mark and screw on the fuel cap.

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A road test must be performed after bleeding. During this, at least one ABS control must be performed!

CAUTION:

Faulty brakes increase the risk of an accident.

- Make sure the brakes are working correctly before driving the vehicle for the first time.

Tightening Specifications

Refer to OVERVIEW - FRONT BRAKES
Refer to OVERVIEW - REAR BRAKES