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Home >> Audi >> 2017 >> A3 Premium, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 31 (Hydraulic Components (Brakes) -- (Sedan)) >> 47 Hydraulic Components >> Hydraulic System >> Hydraulic System, Bleeding >> Hydraulic System, Bleeding Without Brake Charger/Bleeding Unit >> Bleeding Sequence

Bleeding Sequence

WARNING: This page is about a different variant/trim than selected.

- Left front brake caliper

- 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.

-- Remove the cap -1- on each brake caliper bleed screw and connect the container bleed hose to the bleed screw.

Fig 1: Identifying Bleeder Screw Cap
GWWN01-10746Courtesy of AUDI OF AMERICA, LLC

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

NOTE:

Slowly depress the brake pedal to prevent the formation of bubbles.

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

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

-- Hold the pedal in completely depressed position and close the bleeder screw.

-- Release brake pedal and wait approximately 2 seconds so that brake fluid can flow out of the brake fluid reservoir.

-- Repeat the procedure until the brake fluid flows out clear and free of bubbles.

-- Tighten the bleeder screw, remove the bleeder hose and connect put the cap on the bleeder screw.

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

-- Fill the brake fluid reservoir under consideration of brake pad wear up to the max marking and screw on the fuel cap.

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

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

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

Fig 2: Brake Fluid Reservoir
GWWA47-10258Courtesy of AUDI OF AMERICA, LLC

-- Screw down the container.

NOTE:

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