Brake Pads, Removing And Installing: Installing

WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Install in reverse order of removal and note the following:

Always replace brake pads on the same axle at the same time.
When installing new brake pads use the repair kit and new brake pad wear indicator wire.
Clean the bolts and nuts before reusing.
Replace damaged bolts and nuts.
Replace the self-locking bolts and nuts after removal.

TIP:

Coat the brake pad backing plate with grease.
Coat the guide pin with lithium grease.
Do "not" coat the rubber components, seals and adhesive surfaces for the brake pad backing plate with grease or paste.

-- If the brake pads are being replaced, check the brake rotors for wear and damage.

Brake rotor wear limit. Refer to TECHNICAL DATA .

CAUTION:

Health risk due to toxic dust from the brake system.

Irreversible deposit of dust particles in the lungs. Breathing may become impaired.

- Never blow out the brake system with compressed air.

Use only mineral spirits to clean the brake caliper.
Check the brake caliper piston protective caps for damage and install the complete repair kit, if necessary. Refer to BRAKE CALIPER PISTON, REMOVING AND INSTALLING .

Fig 1: Identifying Brake Charger/Bleeder Unit VAS5234

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

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

- Check the brake fluid level before pushing the brake caliper piston back into the brake cylinders.

-- If the brake fluid is up to the "MAX" marking on used brake pads, it must be extracted.

Use the Brake Charger/Bleeder Unit :VAS5234 to extract brake fluid from the brake fluid reservoir.

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

-- Clean the brake carrier -1- at the brake pad spring contact surfaces -arrow- and thinly coat them with lithium grease.

Courtesy of AUDI OF AMERICA, LLC

-- If reusing, install the marked brake pads in the same location.

-- Insert brake pads in brake carrier.

-- Push the brake caliper over the installed brake pads.

Fig 2: Identifying Guide Pins

Courtesy of AUDI OF AMERICA, LLC

Make sure the brake hose is routed correctly.
Make sure the brake hose is not blocked, bent, twisted or rubbing against the vehicle.

-- Tighten the brake caliper bolts -arrows- by counterholding the guide pins -1 and 2-.

Check the brake pad wear indicator contact for damage and replace if necessary.
Make sure that the brake pad wear indicator contact fits correctly in the brake pad.
If the clips go missing, the brake pad wear indicator wire must be replaced.

-- Free up the wire by removing the protective cap -3- from the bleed screw and the clip -4-.

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-- Carefully remove the contact -1- for the brake pad wear indicator using pliers while paying attention to the clip -2-.

-- Drive the parking brake motors up using the Vehicle Diagnostic Tester by following the instructions in the display.

CAUTION:

Faulty brakes increase the risk of an accident.

- Make sure the brakes are working correctly before driving the vehicle for the first time.

-- With the vehicle stationary, firmly press the brake pedal several times so that the brake pads in the operating condition properly sit in their respective position.