🔧 QX80 - Rear Brake Pads & Rotor Replacement

On your QX80, replacing the rear brake pads and rotors restores stopping power and prevents noise/vibration from worn pads or warped rotors. The rear rotors can also be held up by the parking brake shoes inside the rotor “hat,” so correct parking brake release/adjustment matters.

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

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⚠️ Safety & Precautions

• ⚠️ Support the SUV with jack stands; never rely on a jack alone.
• ⚠️ Chock the front wheels; you’ll be releasing the parking brake.
• ⚠️ Avoid breathing brake dust; use brake cleaner, not compressed air.
• ⚠️ Brake parts get hot; work on a cool vehicle.
• ⚠️ Keep brake fluid off paint; it damages finishes.
• ⚠️ Battery disconnect is not required for this rear brake/rotor job.

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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
• 1/2" drive breaker bar
• 1/2" drive torque wrench (20-200 ft-lbs range)
• 14mm socket
• 19mm socket
• Ratchet (1/2" drive)
• Ratchet (3/8" drive)
• C-clamp (6" minimum)
• Flathead screwdriver
• Needle-nose pliers
• Bungee cord
• Wire brush
• Rubber mallet
• Brake cleaner spray
• Shop rags
• 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 - Replace in pairs - Qty: 2
• Brake caliper hardware kit (rear) - Qty: 1
• High-temp brake grease - Qty: 1
• Brake cleaner - Qty: 2 cans
• DOT 3 brake fluid - Qty: 1 quart
• Anti-seize compound - Qty: 1

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📋 Before You Begin

• Park on level ground, turn the engine off, and put the transmission in Park.
• Chock both front wheels firmly.
• Release the parking brake fully (your QX80 uses a mechanical parking brake system).
• Loosen the rear lug nuts 1/2 turn using a 21mm socket and breaker bar before lifting.
• Pop the hood and loosen the brake fluid reservoir cap (do not remove it completely). This helps the caliper piston compress.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the rear

• Lift the rear using a floor jack (rated 3-ton minimum) at the proper rear jacking point.
• Set the frame onto jack stands (rated 3-ton minimum) on both sides.
• Give the SUV a gentle push to confirm it’s stable before working.

Step 2: Remove the rear wheels

• Remove the lug nuts with a 21mm socket and ratchet (1/2" drive).
• Remove both rear wheels and set them aside.

Step 3: Remove the rear brake caliper

• Locate the brake caliper (the clamp that squeezes the pads on the rotor).
• Remove the caliper slide bolts using a 14mm socket and ratchet (3/8" drive).
• Lift the caliper off the pads and hang it from the suspension using a bungee cord.
• Never let the caliper hang by the hose.
• Torque to 34 Nm (25 ft-lbs) for caliper slide bolts (during reassembly).

Step 4: Remove pads and the caliper bracket

• Slide the old pads out by hand. If they’re stuck, gently pry with a flathead screwdriver.
• Remove the caliper bracket (the metal “carrier” that the pads sit in) using a 19mm socket, breaker bar, and ratchet (1/2" drive).
• Torque to 133 Nm (98 ft-lbs) for caliper bracket bolts (during reassembly).

Step 5: Remove the rotor (and back off the parking brake if needed)

• Pull the rotor straight off the hub. If it’s stuck, tap around the rotor hat with a rubber mallet.
• If the rotor won’t come off, the parking brake shoes inside may be holding it.
• Use a flathead screwdriver to rotate the parking brake adjuster through the access slot (typically behind/through the rotor hat area) to loosen the shoes.
• Small turns; test rotor movement often.

Step 6: Clean and prep the hub and bracket

• Clean rust from the hub face using a wire brush. A clean hub helps prevent rotor wobble.
• Spray the hub and surrounding area with brake cleaner spray and wipe with shop rags.
• Apply a very thin film of anti-seize compound to the hub center (avoid the wheel studs and rotor friction surface).

Step 7: Install the new rotor and set parking brake shoe drag

• Clean the new rotor with brake cleaner spray and shop rags to remove packing oil.
• Install the new rotor onto the hub.
• Adjust the parking brake shoes so the rotor turns freely with a very light, even drag.
• Use a flathead screwdriver through the access slot to tighten/loosen the star wheel adjuster as needed.

Step 8: Reinstall the caliper bracket and hardware

• Reinstall the bracket using a 19mm socket and torque wrench.
• Torque to 133 Nm (98 ft-lbs).
• Replace the pad clips from the brake caliper hardware kit (rear) (these are the stainless clips the pads slide on).
• Apply a thin coat of high-temp brake grease where the pad ears touch the clips (do not get grease on the pad or rotor face).

Step 9: Compress the caliper piston

• Place an old pad against the piston face, then use a C-clamp (6" minimum) to slowly press the piston back in.
• Check the brake fluid reservoir as you compress; remove excess fluid if it gets too full (use shop rags to catch spills).
• Go slowly to avoid damaging seals.

Step 10: Install new pads and reinstall the caliper

• Install the new pads into the bracket by hand.
• Lower the caliper over the pads.
• Install and tighten the caliper slide bolts using a 14mm socket and torque wrench.
• Torque to 34 Nm (25 ft-lbs).

Step 11: Reinstall wheels and lower the SUV

• Put the wheels back on and hand-thread lug nuts.
• Lower the SUV off the jack stands using the floor jack.
• Torque the lug nuts in a star pattern using a 21mm socket and torque wrench.
• Torque to 133 Nm (98 ft-lbs).

Step 12: Restore pedal feel and set the parking brake

• With the engine off, pump the brake pedal 10–15 times until it feels firm.
• Apply and release the parking brake several times to help center the parking brake shoes.
• Top off the reservoir with DOT 3 brake fluid if needed, then reinstall the cap.

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✅ After Repair

• Start the engine and confirm the brake pedal feels normal (not sinking).
• Do a slow test drive and confirm no grinding, pulling, or warning lights.
• Check parking brake holding power on a gentle incline.
• Perform pad bed-in: 6–10 medium stops from ~40 mph down to ~10 mph, letting brakes cool a bit between stops.
• Recheck brake fluid level after the test drive.

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💰 DIY vs Shop Cost

Shop Cost: $650-$1,050 (parts + labor)

DIY Cost: $220-$520 (parts only)

You Save: $430-$530 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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