🔧 CX-5 - Rear Brake Pads & Rotor Replacement

You’ll be replacing the rear brake pads and rotors, then resetting the rear electronic parking brake (EPB) so the calipers can clamp correctly again. On your CX-5, the rear calipers are EPB-equipped, so you must retract/service the EPB before pushing the pistons in.

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

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⚠️ Safety & Precautions

• ⚠️ Support your CX-5 on jack stands; never rely on a jack alone.
• ⚠️ Let brakes cool fully; rotors/calipers can burn you.
• ⚠️ Do not press the brake pedal with a caliper removed.
• ⚠️ EPB warning: you must place the EPB into service mode (retract) before compressing the rear pistons.
• ⚠️ Brake dust/cleaner: wear safety glasses and a dust mask; 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
• Safety glasses
• Nitrile gloves
• Dust mask
• Breaker bar (1/2")
• Torque wrench (1/2")
• Torque wrench (3/8")
• Socket set (8mm-21mm)
• 17mm socket
• 14mm socket
• 19mm socket
• Ratchet (3/8")
• Flat-blade screwdriver
• Caliper hanger hook
• C-clamp (6")
• Brake piston compression tool (specialty)
• Wire brush
• Rubber mallet
• Brake cleaner spray
• Bidirectional scan tool with Mazda EPB service mode (specialty)

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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 Replace in pairs
• Rear brake hardware kit (abutment clips/shims) - Qty: 1
• Brake caliper slide pin grease (silicone) - Qty: 1
• Brake pad lubricant (brake quiet) - Qty: 1

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📋 Before You Begin

• Park on level ground, set the front wheels with wheel chocks, and leave the transmission in P.
• Turn ignition OFF and keep the key fob away from the vehicle while your hands are in the brakes.
• Plan to retract the EPB with a bidirectional scan tool. (Bidirectional means it can command parts like the EPB motor, not just read codes.)
• Loosen rear wheel lug nuts slightly before lifting the vehicle.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Retract the Electronic Parking Brake (EPB) into service mode

• Connect your bidirectional scan tool with Mazda EPB service mode (specialty) to the OBD-II port.
• Turn ignition ON (engine OFF).
• Use the scan tool menu to run the rear EPB/parking brake Service Mode (sometimes called “Pad Replacement Mode” or “EPB Maintenance Mode”).
• Confirm you hear the rear EPB motors retract.

Step 2: Lift the rear and remove the wheels

• Use a breaker bar (1/2") with a 19mm socket to loosen the rear lug nuts.
• Lift the rear with a floor jack (rated 3-ton minimum) and support with jack stands (rated 3-ton minimum).
• Remove lug nuts with a 19mm socket and take both rear wheels off.

Step 3: Remove the rear caliper (and support it)

• Locate the rear caliper (the clamp that squeezes the pads).
• Use a 14mm socket and ratchet (3/8") to remove the caliper slide bolts (also called slide pins).
• Lift the caliper off the bracket and hang it using a caliper hanger hook (do not let it dangle by the hose).

Step 4: Remove the pads and caliper bracket

• Pull the old pads out of the bracket by hand (use a flat-blade screwdriver gently if they’re stuck).
• Use a 17mm socket and breaker bar (1/2") to remove the caliper bracket bolts.
• Remove the caliper bracket from the knuckle.

Step 5: Remove the old rotor

• Spray the rotor hat and hub area with brake cleaner spray.
• If the rotor is seized, tap around the rotor “hat” using a rubber mallet until it breaks free.
• Remove the rotor.

Step 6: Clean the hub and install the new rotor

• Use a wire brush to clean rust from the hub face (this helps prevent brake pulsation).
• Clean the new rotor friction surfaces using brake cleaner spray.
• Install the new rotor onto the hub.

Step 7: Service the bracket hardware and slide pins

• Remove old abutment clips from the bracket (use a flat-blade screwdriver).
• Install new clips from the rear brake hardware kit.
• Pull the slide pins out, wipe them clean, then apply a thin coat of brake caliper slide pin grease (silicone) and reinstall.
• Grease only the pin, not the pad surface.

Step 8: Reinstall the caliper bracket

• Position the bracket over the new rotor.
• Install bracket bolts by hand, then tighten with a 17mm socket and torque wrench (1/2").
• Torque to 98-118 Nm (72-87 ft-lbs)

Step 9: Install the new pads

• Apply a thin layer of brake pad lubricant (brake quiet) to the pad backing plates where they contact the caliper/bracket (not on the pad friction material).
• Install inner and outer pads into the bracket.

Step 10: Compress the rear caliper piston and reinstall the caliper

• Use a brake piston compression tool (specialty) to slowly push the piston straight back into the caliper.
• If needed, use a C-clamp (6") carefully and keep the piston square.
• Set the caliper over the new pads and install the slide bolts.
• Tighten slide bolts with a 14mm socket and torque wrench (3/8").
• Torque to 25-30 Nm (18-22 ft-lbs)

Step 11: Repeat on the other rear side

• Do the same pad/rotor replacement steps on the opposite rear wheel.

Step 12: Re-enable EPB and reinstall wheels

• Use the bidirectional scan tool with Mazda EPB service mode (specialty) to command the EPB out of service mode (apply/initialize).
• Reinstall wheels and hand-thread lug nuts.
• Lower the vehicle, then torque lug nuts in a star pattern using a torque wrench (1/2") and 19mm socket.
• Torque to 108-147 Nm (80-108 ft-lbs)

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✅ After Repair

• With the vehicle on the ground, pump the brake pedal 10-15 times until it feels firm.
• Turn ignition ON and confirm no EPB/brake warning lights remain on.
• Do a cautious test drive and verify no grinding, pulling, or pulsation.
• Bed-in the pads: make 6-10 moderate stops from ~30-40 mph, allowing a little cooling between stops.
• Recheck lug nut torque after 25-50 miles using a torque wrench (1/2").

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💰 DIY vs Shop Cost

Shop Cost: $550-$950 (parts + labor)

DIY Cost: $220-$450 (parts only)

You Save: $330-$500 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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