Audi Q7: Rear Brake Caliper, Removing and Installing
Special tools and workshop equipment required
- Torque Wrench 1332 40-200Nm -VAG1332-
Caution
This procedure contains mandatory replaceable parts. Refer to component overview prior to starting procedure.
Mandatory Replacement Parts
- Bolts - Brake Caliper to Brake Carrier
- Brake Pad Wear Indicator Wire - Replace when pads are replaced.
- Brake Pad Retaining Plate - Replace when pads are replaced.
- Brake Pad Spring - Replace when pads are replaced.
Note
In the following description the brake caliper is removed with the brake carrier and brake pads. The brake hose remains connected.
Removing
- Loosen the parking brake.
- Switch off the ignition.
Note
Do not disconnect the connectors from the parking brake motors.
- Remove the rear wheel. Refer to → Suspension, Wheels, Steering; Rep. Gr.44; Wheels and Tires.
- Carefully remove the contact -5- for the brake pad wear indicator using pliers at the same time pay attention to the clip -4-.
Note
- If the clips go missing, the brake pad wear indicator wire must be replaced.
- Pushing on the inner brake pad lightly with suitable pliers -1- makes it easier to remove the brake caliper from the brake rotor. To prevent damage to the paint coat on the brake caliper, place a piece of rubber -2- between the pliers and brake caliper.
- Do not damage the contact -3- for the brake pad wear indicator.
- Remove the bolts -arrows- on the brake carrier.
- Remove the brake caliper with brake carrier and brake pads installed from the brake rotor.
Note
If the brake rotor is so worn that the brake caliper cannot be removed, then the parking brake must be adjusted back.
Caution
Danger of damaging the brake hose.
- 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.
Risk of damaging the brake caliper piston.
Do not operate the brakes or the electro-mechanical parking brake when the brake caliper is removed.
- Hang the brake caliper with the brake carrier on the body using a suitable wire.
Installing
Install in reverse order of removal and note the following:
Note
Replace the brake carrier bolts after removing.
WARNING
Health Risk.
Do not blow out brake system with compressed air.
Note
Use only mineral spirits to clean the brake caliper.
- Carefully slide the brake caliper with the brake carrier and the brake pads installed over the brake rotor.
- Tighten the new bolts -arrows- on the brake carrier.
Note
- Make sure that the wire and brake hose are routed correctly.
- Make sure the brake hose is not blocked, bent, twisted or rubbing against the vehicle.
- Install the brake pad wear indicator wire. Refer to → Chapter "Brake Pad Wear Indicator Wire, Removing and Installing".
- Install the rear wheel. Refer to → Suspension, Wheels, Steering; Rep. Gr.44; Wheels and Tires.
- Drive the parking brake motor out. Refer to Vehicle Diagnostic Tester by following the instructions in the display.
WARNING
Risk of accident!
- With the vehicle stationary, firmly press the brake pedal several times so that the brake pads in the operating condition properly set in their respective position.
- Make sure the brakes are working correctly before driving the vehicle for the first time.
Tightening Specifications
- Refer to → Chapter "Overview - Rear Brakes"
- Refer to → Suspension, Wheels, Steering; Rep. Gr.44; Wheels and Tires.
Rear Brake Caliper, Replacing
Special tools and workshop equipment required
- Torque Wrench 1331 5-50Nm -VAG1331-
- Brake Pedal Actuator -VAG1869/2-.
- Bleeder bottle from the Brake Charger/Bleeder Unit -VAS5234-
- M10 plug -item 1- or M12 -item 2- from the Assembly Part Set -5Q0 698 311-
- Lithium Grease -G 052 150 A2-. Refer to the Parts Catalog.
Caution
This procedure contains mandatory replaceable parts. Refer to component overview prior to starting procedure.
Mandatory Replacement Parts
- Bolts - Brake Caliper to Brake Carrier
Note
In the following description the brake caliper is removed and disconnected from the hydraulic system. The brake hose is removed.
Removing
- Loosen the parking brake.
- Switch off the ignition.
- Insert the Brake Pedal Actuator -VAG1869/2- between the brake pedal and driver seat. Preload the brake pedal at least 60 mm.
Note
By doing this, the valves in the brake master cylinder are closed and the brake fluid reservoir does not run empty.
- Remove the rear wheel. Refer to → Suspension, Wheels, Steering; Rep. Gr.44; Wheels and Tires.
WARNING
Risk of skin irritation.
To prevent skin contact with brake fluid, wear chemical resistant safety gloves.
- Remove the protective cap -3- from the bleed screw -1- on the left front caliper.
- Connect the bleeder bottle hose -2- as shown.
- Open the bleed screw to reduce the pressure in the brake system.
- Close the bleed screw and remove the bleeder bottle.
- Repeat the procedure on the left rear brake caliper.
Note
Do not remove the Brake Pedal Actuator -VAG1869/2-.
- Disconnect the connector -arrow- from the electro-mechanical parking brake motor.
WARNING
Malfunctions from contact with brake fluid with fluids containing mineral oils.
Brake fluid must never come into contact with fluids containing mineral oils (oil, gas, cleaning solutions). Safety gloves must be free of oil and grease.
Risk of damaging the painted surfaces.
Due to its caustic nature, brake fluid must also never be brought into contact with paint. Wash off any spilled brake fluid immediately with plenty of water.
- Remove the banjo bolt -arrow-.
- Remove the brake pads. Refer to → Chapter "Brake Pads, Removing and Installing".
- Remove the electro-mechanical parking brake motor. Refer to → Chapter "Left and Right Parking Brake Motor - V282-/-V283-, Removing and Installing".
Installing
Install in reverse order of removal and note the following:
- Install the electro-mechanical parking brake motor. Refer to → Chapter "Left and Right Parking Brake Motor - V282-/-V283-, Removing and Installing".
- Install the brake pads. Refer to → Chapter "Brake Pads, Removing and Installing".
- Tighten the brake hose banjo bolt -arrow- on the brake caliper.
- Remove the Brake Pedal Actuator -VAG1869/2-.
- Only bleed the brakes on the wheel which the brake caliper and the brake hose was separated. Refer to → Chapter "Hydraulic System, Bleeding".
Note
If the brake pedal still feels "soft", completely bleed the brakes. Refer to → Chapter "Hydraulic System, Bleeding".
WARNING
Risk of accident!
- With the vehicle stationary, firmly press the brake pedal several times so that the brake pads in the operating condition properly set in their respective position.
- Make sure the brakes are working correctly before driving the vehicle for the first time.
Tightening Specifications
- Refer to → Chapter "Overview - Rear Brakes"
- Refer to → Suspension, Wheels, Steering; Rep. Gr.44; Wheels and Tires.
Rear Brake Carrier, Removing and Installing
Special tools and workshop equipment required
- Torque Wrench 1332 40-200Nm -VAG1332-
Caution
This procedure contains mandatory replaceable parts. Refer to component overview prior to starting procedure.
Mandatory Replacement Parts
- Bolts - Brake Caliper to Brake Carrier
Removing
- Remove the brake pads. Refer to → Chapter "Brake Pads, Removing and Installing".
- Remove the bolts -arrows- and remove the brake carrier -1-.
Installing
Install in reverse order of removal and note the following:
WARNING
Health Risk.
Do not blow out brake system with compressed air.
Note
Use only mineral spirits to clean the brake carrier.
- Install the brake pads. Refer to → Chapter "Brake Pads, Removing and Installing".
WARNING
Risk of accident!
- With the vehicle stationary, firmly press the brake pedal several times so that the brake pads in the operating condition properly set in their respective position.
- Make sure the brakes are working correctly before driving the vehicle for the first time.
Tightening Specifications
- Refer to → Chapter "Overview - Rear Brakes"
