🔧 CX-5 - Rear Brake Pads & Rotor Replacement

You’ll remove the rear calipers, swap the rear rotors, and install new rear brake pads. The key on your CX-5 is handling the rear parking brake system correctly so you don’t damage the rear calipers.

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

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⚠️ Safety & Precautions

• ⚠️ Support the CX-5 on jack stands before working under it.
• ⚠️ Do not press the brake pedal while a caliper is off the rotor.
• ⚠️ If your CX-5 has an electronic parking brake (EPB), you must retract it (service mode) before pushing the pistons in.
• ⚠️ Brakes may contain dust; use brake cleaner, not compressed air.
• ⚠️ Battery disconnect is not required, but keep the key away so the EPB can’t activate by accident.

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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, pair)
• Wheel chocks
• 21mm socket
• 3/8" drive ratchet
• 1/2" drive breaker bar
• 14mm socket
• 17mm socket
• Torque wrench (20-150 ft-lbs)
• Flat trim tool
• Large C-clamp
• Brake caliper hanger hook
• Wire brush
• Dead blow hammer
• Dial indicator with magnetic base (specialty)
• Scan tool with Mazda EPB service function (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 pad hardware kit (clips/shims) - Qty: 1
• Brake parts cleaner - Qty: 1
• High-temp silicone brake grease - Qty: 1
• DOT 3 brake fluid - Qty: 1 quart
• Anti-seize compound - Qty: 1

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📋 Before You Begin

• Park on level ground, set the transmission to Park, and chock the front wheels.
• Confirm parking brake type: if you have a small switch on the console, that’s EPB (electronic parking brake).
• EPB note: You must place the EPB into service mode using a scan tool with Mazda EPB service function (specialty). This retracts the parking brake motor so the piston can be pushed back safely.
• Tip: Take a photo of each side before disassembly.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Retract the rear parking brake (EPB service mode)

• If your CX-5 has EPB, connect the scan tool with Mazda EPB service function (specialty) and command Rear EPB Maintenance/Service Mode.
• This retracts the parking brake motor so you can compress the rear caliper piston without damage.
• Definition: “Service mode” is a setting that backs off the electric parking brake so the caliper can be serviced.

Step 2: Loosen lug nuts and raise the rear

• Use a 21mm socket and 1/2" drive breaker bar to loosen the rear lug nuts 1/2 turn (don’t remove yet).
• Lift the rear with the floor jack (rated 3-ton minimum) and support with jack stands (rated 3-ton minimum, pair).
• Remove the wheels using the 21mm socket and 3/8" drive ratchet.

Step 3: Remove the rear caliper

• Turn the steering wheel is not needed for the rear; position yourself for access.
• Remove the two caliper slide bolts using a 14mm socket and 3/8" drive ratchet.
• Lift the caliper off and hang it from the suspension using a brake caliper hanger hook.
• Do not let the caliper hang by the brake hose.

Step 4: Remove pads and caliper bracket

• Remove the inner and outer brake pads by hand. Use a flat trim tool if they’re stuck.
• Remove the caliper bracket bolts using a 17mm socket and 1/2" drive breaker bar.
• Set the bracket aside.
• When reinstalling the bracket bolts, Torque to 70 Nm (52 ft-lbs).

Step 5: Remove the rear rotor

• Spray the hub/rotor hat area with brake parts cleaner.
• If the rotor is stuck, tap the rotor hat evenly using a dead blow hammer until it breaks free.
• Clean the hub face with a wire brush so the new rotor sits flat.

Step 6: Install the new rotor and verify seating

• Clean the new rotors with brake parts cleaner to remove shipping oil.
• Install the new rotor onto the hub.
• Optional but best practice: check rotor runout using a dial indicator with magnetic base (specialty).
• Apply a very thin film of anti-seize compound to the hub face only (keep it off rotor friction surfaces).

Step 7: Service slide pins and install new hardware

• Pull the caliper slide pins out of the bracket by hand.
• Wipe them clean and apply a thin coat of high-temp silicone brake grease.
• Install the new pad clips from the rear brake pad hardware kit (clips/shims) onto the bracket.
• Definition: “Slide pins” are the smooth pins the caliper moves on.

Step 8: Compress the rear caliper piston

• Make sure EPB service mode is active (Step 1).
• Use a large C-clamp to slowly push the caliper piston straight back into the caliper.
• Go slowly and watch the brake fluid level; add/remove as needed with fresh DOT 3 brake fluid.
• Tip: If it won’t compress, stop and recheck EPB mode.

Step 9: Install new pads and reinstall caliper

• Apply a light layer of high-temp silicone brake grease where the pads touch the clips (not on the pad friction surface).
• Install the new pads into the bracket.
• Reinstall the caliper over the pads.
• Install caliper slide bolts using a 14mm socket and 3/8" drive ratchet, then Torque to 25 Nm (18 ft-lbs).

Step 10: Reinstall wheels and torque lug nuts

• Reinstall the wheels and hand-thread the lug nuts.
• Lower the CX-5 off the stands using the floor jack (rated 3-ton minimum).
• Tighten lug nuts in a star pattern using a 21mm socket and torque wrench (20-150 ft-lbs), Torque to 108 Nm (80 ft-lbs).

Step 11: Exit EPB service mode

• Use the scan tool with Mazda EPB service function (specialty) to command Exit Maintenance/Service Mode.
• Confirm no EPB warning lights remain on.

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✅ After Repair

• With the engine off, pump the brake pedal 10-15 times until it feels firm.
• Start the engine and confirm the pedal stays firm.
• Apply and release the parking brake a few times to confirm normal operation.
• Do a slow test drive, then recheck for leaks, odd noises, or pulling.
• Brake pad bed-in: do several gentle stops from 30-40 mph, letting brakes cool between stops.

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💰 DIY vs Shop Cost

Shop Cost: $450-$800 (parts + labor)

DIY Cost: $180-$400 (parts only)

You Save: $270-$400 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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