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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis (Single Page) >> Brakes >> Parking Brake System >> Mechanical Components (Brake System) (2 Of 2) >> 46 Mechanical Components >> Rear Brakes >> Rear Brake Pads, Removing And Installing >> Removing

Rear Brake Pads, Removing And Installing: Removing

-- Loosen the parking brake.

-- Switch off the ignition.

NOTE:

Label the brake pads when removing if they are going to be used again. Install in the same position, otherwise the braking effect will be uneven.

Do not disconnect the connectors from the parking brake motors.

-- Remove the rear wheel. Refer to Wheels and Tires .

NOTE:

If the brake pads are replaced, use the Vehicle Diagnostic Tester to press back the parking brake motor.

-- Drive back the parking brake motor: 

Fig 1: Connecting Diagnostic Cable VAS 5051/5A To Diagnostic Connector
GWWA00-10303Courtesy of AUDI OF AMERICA, LLC

-- Connect the Vehicle Diagnostic Tester to the vehicle data link connector when the ignition is switched off.

-- Switch the ignition on.

-- Select Diagnostic  and start.

-- Select the Test plan  tab.

-- Select Select individual tests...  and select the following tree structures consecutively:

-- Start the selected program and follow the instructions on the Vehicle Diagnostic Tester display.

-- Free up the wire by removing the protective cap -2- from the bleeder screw and opening the clip -1-.

GWWA46-10525Courtesy of AUDI OF AMERICA, LLC

-- Carefully remove the contact -4- for the brake pad wear indicator sensor using pliers while paying attention to the clip -3-.

NOTE:

If the clips go missing, the brake pad wear indicator sensor wire must be replaced.

-- Remove the bolts -arrows- by counterholding the guide pins -1 and 2-.

Fig 2: Identifying Guide Pins
GWWA46-10254Courtesy of AUDI OF AMERICA, LLC

-- Remove the brake caliper and guide the brake pad wear indicator sensor wire out at the same time.

CAUTION:

Risk of damaging the brake hose, brake line and brake piston.

  • Do not let the brake caliper hang on the brake hose. Do not support the weight with the brake hose.
  • Replace the brake hose if damaged.
  • The brake line must not be bent.
  • A damaged brake line must be replaced.
  • Do not press the brake pedal when the brake caliper is removed.
  • Do not operate the parking brake when the rear brake caliper is removed.
  • A damaged brake piston must be replaced.

-- Hang the brake caliper using a suitable wire.

-- Remove the brake pads.