Brake Pads, Removing And Installing: Removing

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The parking brake is released.

NOTE:

When removing, mark brake pads that will be used again. Install in the same position, otherwise braking effect will be uneven.

Do not disconnect the connectors from the parking brake motors.

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

-- Connect the Vehicle diagnostic tester to the diagnostic connection on the vehicle with the ignition switched off.

Fig 1: Identifying DLC Terminals

Courtesy of AUDI OF AMERICA, LLC

-- Turn on the ignition.

-- After entering the VIN, select Guided Functions .

-- Drive back the parking brake motor:

Suspension/brake system
	01_OBD-capable systems
		53 Electromechanical parking brake control module J540
			53 Electrical parking brake functions
				53 46 Remove brake pads

-- Continue to follow the instructions in the vehicle diagnostic tester display.

-- Remove affected rear wheel, refer to WHEEL, CHANGING AND MOUNTING .

-- Remove the brake hose and electrical wire from the bracket on the stub axle carrier

-- Remove attachment bolts from brake caliper housing, counter-hold guide pins to do so.

Fig 2: Identifying Attachment Bolts For Brake Caliper Housing

Courtesy of AUDI OF AMERICA, LLC

-- Remove the brake caliper.

CAUTION:

Do not let the brake caliper with the brake carrier hang on the brake hose. Do not support the weight with the brake hose.
Replace the brake hose if damaged.
Do not actuate the brakes or the electromechanical parking brake when the brake caliper is removed.

-- Remove the brake pads.

-- Remove the brake pad retaining plate.

NOTE:

When using the Vehicle Diagnostic Tester to press back the pistons, the pressure nut drives back on the spindle.

The piston must then be completely pressed back using the Piston Resetting Tool T10145

CAUTION:

Danger of contamination and paint damage from escaping brake fluid.

If the brake pads are worn out and brake fluid is filled, the brake fluid may overflow if the pistons in the brake cylinder are pressed back.
Check the brake fluid level before pressing back the pistons. If there is brake fluid up to the "MAX" mark, some brake fluid will need to be extracted.
Use the Brake Charger/Bleeder Unit VAS5234 to extract brake fluid from brake fluid reservoir.

-- Use the Piston Resetting Tool T10145 to completely press back the piston.

Fig 3: Pressing Piston Back Into Caliper Housing

Courtesy of AUDI OF AMERICA, LLC

Do not tilt the brake piston when pressing it back.