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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Mechanical Components (Brake System) (1 Of 2) >> 46 Mechanical Components >> Front Brakes >> Brake Caliper, Replacing >> Brake Caliper, Replacing, Ceramic Brakes >> Removing

Brake Caliper, Replacing, Ceramic Brakes: Removing

Fig 1: Brake Pedal Depressor VAG 1869/2 Inserted Between Brake Pedal And Driver's Seat
GWWA44-0020Courtesy of AUDI OF AMERICA, LLC

-- Insert the Brake Pedal Actuator :VAG1869/2  between the brake pedal and driver seat. Pretension the brake pedal at least 60 mm.

TIP:

By doing this, the valves in the brake master cylinder are closed and the brake fluid reservoir does not run empty.

-- Remove the front wheel. Refer to WHEEL, CHANGING .

Fig 2: Identifying Protective Cap, Bleed Screw And Container Bleeder Hose
GWWA46-10203Courtesy of AUDI OF AMERICA, LLC

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

CAUTION:

Leaking brake fluid increases the risk of injury.

Risk of skin irritation and injury.

- Wear safety gloves.

-- Connect the bleeder bottle hose -2-.

-- Open the bleed screw to reduce the pressure in the hydraulic system.

-- Close the bleed screw and remove the bleeder bottle.

-- Disconnect the connector -2-.

Fig 3: Brake Pad Wear Sensor -1-
GWWA46-10271Courtesy of AUDI OF AMERICA, LLC

-- Release the tab in direction of -arrow A- and turn 90° in direction of -arrow B- at the same time. Then remove and free up the brake pad wear sensor -1- from the bracket.

-- Remove the bolts -2- for the bracket -3-.

GWWA46-10657Courtesy of AUDI OF AMERICA, LLC

-- To protect against escaping brake fluid, place a cloth under the separating point.

CAUTION:

Risk of accident due to the brakes malfunctioning.

- Brake fluid must never come into contact with fluids containing mineral oils (oil, gasoline, cleaning solutions).

- Wear safety gloves that are free of oil and grease.

-- Remove the union bolt -1- and move the brake hose to the side.

-- Immediately seal the open connection points with clean plugs from the Engine Bung Set :VAS6122  .

CAUTION:

There is a risk of contamination and paint damage from leaking brake fluid.

- Rinse off any leaking brake fluid immediately using plenty of water.

-- Remove the brake pads. Refer to BRAKE PADS, REMOVING AND INSTALLING, CERAMIC BRAKES .