🔧 Cadenza - Rear Brake Pads & Rotors Replacement

You’ll remove the rear wheels, unbolt the rear brake calipers, replace the pads, and swap the rotors. The key is supporting the caliper so the brake hose isn’t stressed, and making sure the rear caliper piston is pushed back the correct way (this can differ if your A4 has an electronic parking brake).

Difficulty Level: Intermediate | Estimated Time: 2-4 hours

Assumption: Torque specs can vary by production details; verify with the factory service info if available.

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⚠️ Safety & Precautions

• ⚠️ Support the car with jack stands before working under/around the wheel area.
• ⚠️ Do not press the brake pedal with a caliper removed; it can pop the piston out.
• ⚠️ Keep grease/oil off pad friction material and rotor faces (brakes won’t work right).
• ⚠️ If equipped with electronic parking brake (EPB), put it in service/maintenance mode before pushing pistons in, or you can damage the EPB system.
• ⚠️ Brake dust is harmful—use brake cleaner, not compressed air.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• 21mm socket
• Breaker bar (1/2")
• Torque wrench (20-150 ft-lbs range)
• Ratchet (3/8")
• 14mm socket
• 17mm socket
• Open-end wrench set (14mm)
• Flat trim/pry tool
• C-clamp style brake piston compressor
• Wire brush
• Brake cleaner
• Bungee cord
• High-temperature silicone brake grease
• Impact driver with Phillips bit
• OBD2 scan tool with EPB service mode (specialty)
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear brake pad set - Qty: 1
• Rear brake rotors - Qty: 2
• Rear brake hardware kit - Qty: 1
• Brake cleaner - Qty: 1
• DOT 3/4 brake fluid - Qty: 1 quart

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📋 Before You Begin

• Park on level ground, turn the ignition off, and place wheel chocks at the front wheels.
• Loosen rear wheel lug nuts 1/2 turn using a 21mm socket and breaker bar before lifting.
• If equipped with EPB: use a scan tool with EPB service mode to retract/release the parking brake motors (often called “EPB Maintenance Mode”).
• Open the hood and check brake fluid level; as you compress pistons, fluid rises. Remove a little fluid if it’s at the MAX line.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the rear

• Use a floor jack (rated 3-ton minimum) to lift the rear at the proper jacking point.
• Set the car down onto jack stands (rated 3-ton minimum).
• Remove both rear wheels using a 21mm socket and ratchet.

Step 2: Remove the rear caliper (do not let it hang)

• Turn the steering slightly if needed for access, then locate the two caliper slide bolts.
• Hold the slide pin with a 14mm open-end wrench if it wants to spin, and remove the slide bolts with a 14mm socket and ratchet.
• Lift the caliper off and hang it from the suspension using a bungee cord. Never hang by the hose.
• Torque spec (caliper slide bolts): Torque to 25-35 Nm (18-26 ft-lbs)

Step 3: Remove pads and hardware

• Remove the old pads by hand; use a flat trim/pry tool if they’re stuck.
• Remove the stainless pad clips (hardware) from the bracket.
• Clean the bracket pad “lands” (where the clips sit) using a wire brush and brake cleaner.

Step 4: Remove the caliper bracket

• Remove the caliper bracket bolts using a 17mm socket and breaker bar.
• Remove the bracket and set it aside.
• Torque spec (caliper bracket bolts): Torque to 85-105 Nm (63-77 ft-lbs)

Step 5: Remove the rotor

• If there’s a rotor retaining screw, remove it using an impact driver with Phillips bit.
• Pull the rotor off the hub. If stuck, tap the rotor hat lightly (outside face) and wiggle it free.
• Clean the hub face with a wire brush and brake cleaner so the new rotor sits flat.

Step 6: Install the new rotor

• Spray both sides of the new rotor with brake cleaner and wipe clean (removes protective oil).
• Install the rotor onto the hub. Reinstall the retaining screw (if equipped) using the impact driver with Phillips bit.

Step 7: Reinstall the bracket and new hardware

• Reinstall the caliper bracket using a 17mm socket and torque wrench.
• Torque to 85-105 Nm (63-77 ft-lbs)
• Install the new pad clips from the hardware kit.
• Apply a thin film of high-temperature silicone brake grease to the clip contact points (not on rotor/pad friction).
• Grease only where pads slide.

Step 8: Compress the rear caliper piston (method depends on parking brake)

• Check the brake fluid reservoir again before compressing the piston.
• If equipped with EPB: confirm EPB is in service/maintenance mode using the OBD2 scan tool with EPB service mode (specialty), then compress the piston using a C-clamp style brake piston compressor.
• If not EPB (mechanical parking brake): ensure the parking brake is fully released, then compress the piston using a C-clamp style brake piston compressor.
• Go slow—watch fluid level.

Step 9: Install new pads and refit the caliper

• Install the new pads into the bracket by hand. Make sure they slide freely in the clips.
• Set the caliper over the new pads.
• Install the slide bolts using a 14mm socket and ratchet, holding the slide pin with a 14mm open-end wrench if needed.
• Torque to 25-35 Nm (18-26 ft-lbs)

Step 10: Reinstall wheels and torque lug nuts

• Reinstall both rear wheels by hand-threading lug nuts first.
• Lower the car off the jack stands using the floor jack.
• Torque lug nuts in a star pattern using a torque wrench.
• Torque to 90-110 Nm (66-81 ft-lbs)

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✅ After Repair

• Press the brake pedal slowly 10-15 times until it feels firm (this seats the pads against the rotors).
• Check brake fluid level and top off with DOT 3/4 brake fluid if needed.
• If equipped with EPB: use the OBD2 scan tool with EPB service mode (specialty) to exit service mode, then apply/release EPB to confirm normal operation.
• Do a careful test drive: start at low speed, confirm no grinding, pulling, or pulsation.
• Pad bedding (recommended): do 6-8 moderate stops from 40 mph to 10 mph, with cool-down driving between stops. Don’t hold brakes at a stop.

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💰 DIY vs Shop Cost

Shop Cost: $450-$850 (parts + labor)

DIY Cost: $180-$420 (parts only)

You Save: $270-$430 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-3 hours.

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🎯 Ready to get started?

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