Hydraulic System, Bleeding Without Brake Charger/Bleeding Unit

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2022 Audi SQ7, 2022 Audi Q7, 2021 Audi SQ7, 2021 Audi Q7, and 2020 Audi SQ7. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Container -1-
Brake Bleeding Tool Set: VAS6564
Wrench - Brake Bleeder Set: VAS5519

NOTE:

The brake system is divided by the axle on this vehicle.

Right and left front axle

Right and left rear axle

Procedure

Wheels are removed. Refer to WHEELS AND TIRES .

NOTE:

Make sure that the brake fluid reservoir is always filled.

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

Fig 1: Brake Fluid Reservoir

Courtesy of AUDI OF AMERICA, LLC

-- Screw down the reservoir.

-- Remove the protective cap -3- from the bleed screw -1- on the respective brake caliper.

Fig 2: Identifying Protective Cap, Bleed Screw And Container Bleeder Hose

Courtesy of AUDI OF AMERICA, LLC

-- Connect the bleeder bottle hose -2- as shown.

NOTE:

Use a suitable bleeder hose. It must be seated tightly on the bleed screw so that no air can enter the brake system.

The front brake calipers each have two bleed screws.

Bleed the brake caliper at each bleed screw.

Bleeding Sequence

Outer Left Front Brake Caliper
Inner Left Front Brake Caliper
Outer Right Front Brake Caliper
Inner Right Front Brake Caliper
Left Rear Brake Caliper
Right Rear Brake Caliper

NOTE:

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

-- Build pressure up in brake system by pumping brake pedal.

NOTE:

Press the brake pedal slowly to prevent bubbles from building up.

-- As soon as pressure is built up, hold the brake pedal in depressed position.

-- Open the bleeder screw with bleeder bottle hose connected, until the pressure is reduced (pedal drops).

-- Hold the pedal in the depressed position and close the bleed screw.

-- Release brake pedal and wait approximately two seconds so that brake fluid can flow out of the brake fluid reservoir.

-- Repeat the procedure until the brake fluid flows out clear and without bubbles.

-- Tighten the bleed screw, remove the bleeder hose and place the protective cap on the bleed screw.

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

-- Fill the brake fluid reservoir up to the "MAX" mark and tighten the cap.

Fig 3: Brake Fluid Reservoir

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Do not add brake fluid above the "MAX" mark otherwise it will leak out of the reservoir.

-- Start the engine and check the brake pedal travel and pressure.

-- If the pedal travel is too long, check the brake system for leaks or repeat the bleeding procedure.

WARNING:

Risk of accident!

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

Changing the Brake Fluid

Refer to 413.

Tightening Specifications

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