🔧 CX-5 - Rear Brake Pad Replacement

The critical move is putting the electric parking brake into maintenance mode before removing the calipers. After that, replacing both rear pad sets is a manageable job, and the piston presses straight inward rather than twisting.

Difficulty Level: Intermediate | Estimated Time: 1.5-2.5 hours

Assumption: The rear rotors are smooth, within thickness specification, and free of deep grooves or heavy heat damage.

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⚠️ Safety & Precautions

• ⚠️ Never work under your CX-5 while it’s supported only by a jack.
• ⚠️ Enter EPB maintenance mode before compressing either rear piston. Mazda requires maintenance mode for rear brake service on EPB-equipped CX-5 models. static.nhtsa.gov
• ⚠️ Do not twist the rear pistons or operate the EPB switch with a caliper removed.
• ⚠️ Chock both front wheels because the parking brake must remain released.
• ⚠️ Don’t press the brake pedal while either caliper is removed.
• ⚠️ Avoid breathing brake dust. Use brake cleaner rather than compressed air.
• ⚠️ Battery disconnection is not required. The battery must remain connected for maintenance mode.

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🔧 Required Tools

You'll need the following tools for this repair:

• 21mm deep socket
• 14mm socket
• 3/8-inch drive ratchet
• 1/2-inch drive breaker bar
• 1/2-inch drive torque wrench rated 150 ft-lbs
• 3/8-inch drive torque wrench rated 10-80 ft-lbs
• Rear brake caliper compression tool (specialty)
• Small flat-blade screwdriver
• Nylon detailing brush
• Brake caliper hanger hook
• Floor jack rated 2-ton minimum
• Jack stands rated 2-ton minimum, pair
• Wheel chocks, pair
• Mechanic’s gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear ceramic brake pad set - Qty: 1
• Rear brake pad hardware kit - Qty: 1 if not included with pads
• Silicone ceramic brake lubricant - Qty: 1
• Non-chlorinated brake cleaner - Qty: 1 can

Replace the pads on both rear wheels, even if one side looks less worn. The rear-brake aisle is open beside this guide.

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📋 Before You Begin

• 📋 Park on firm, level ground with the transmission in Park.
• 📋 Turn off AUTOHOLD and place wheel chocks firmly against both sides of a front tire.
• 📋 Check the brake-fluid reservoir. If it’s completely full, remove a small amount with a clean fluid syringe before compressing the pistons.
• 📋 Leave the battery connected and make sure it’s adequately charged.
• 📋 Keep the driver’s door closed while entering EPB maintenance mode.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Enter EPB maintenance mode

• Sit in the driver’s seat and keep your foot off the brake pedal.
• Press the start button twice to switch the ignition ON without starting the engine.
• Depress the brake pedal and push the EPB switch downward to release the parking brake. Confirm the red parking-brake indicator goes out.
• Switch the ignition OFF.
• Fully depress and hold the accelerator pedal. At the same time, push and hold the EPB switch downward.
• While holding both controls, switch the ignition ON without starting the engine within five seconds.
• Listen for the rear EPB motors retracting. Confirm the amber brake-system warning light illuminates, then release the pedal and switch.
• Motor noise here is expected.

Step 2: Loosen the rear wheel nuts

• Use the 21mm deep socket and 1/2-inch drive breaker bar to loosen each rear lug nut about one-half turn.
• Do not remove the lug nuts while your CX-5 is still on the ground.

Step 3: Raise and support the rear

• Use the floor jack rated 2-ton minimum at the specified rear lifting point.
• Place the jack stands rated 2-ton minimum, pair beneath the approved side support points.
• Lower your CX-5 gently onto the stands, then lightly shake the body to confirm it’s stable.
• Use the 21mm deep socket and 3/8-inch drive ratchet to remove both rear wheels.

Step 4: Inspect the first rear brake

• Wear safety glasses and spray the assembly with non-chlorinated brake cleaner.
• Inspect the brake hose, caliper dust boot, rotor surface, and pad wear.
• If one pad is dramatically thinner than its partner, stop and inspect the slide pins and caliper for binding.
• Replace the rotors in pairs if they’re deeply grooved, cracked, heavily rust-pitted, or heat-spotted.

Step 5: Remove the caliper

• Use the 14mm socket and 3/8-inch drive ratchet to remove the upper and lower caliper slide bolts.
• Lift the caliper from the bracket without pulling on its electrical wiring or brake hose.
• Support it with the brake caliper hanger hook.
• Never let the caliper hang from the hose. Brake hoses don’t appreciate being used as bungee cords.

Step 6: Remove the old pads and hardware

• Pull the inner and outer pads from the caliper bracket by hand.
• If necessary, use the small flat-blade screwdriver carefully without gouging the rotor or bracket.
• Remove the stainless pad clips if replacements are included.
• Use the nylon detailing brush and brake cleaner to clean the pad-contact surfaces.

Step 7: Inspect and lubricate the slide pins

• Pull one slide pin out at a time by hand so their positions aren’t mixed.
• Wipe off the old grease and inspect the pin and rubber boot for rust, scoring, swelling, or tears.
• Apply a thin coating of silicone ceramic brake lubricant and reinstall the pin.
• Confirm each pin moves smoothly and its rubber boot seats fully.
• Do not put petroleum grease on rubber brake parts.

Step 8: Compress the caliper piston

• Place the old inner pad against the piston face.
• Use the rear brake caliper compression tool to press the piston slowly and straight into the caliper.
• Watch the brake-fluid reservoir and stop if the fluid approaches the rim.
• Do not rotate the piston. Maintenance mode retracts the EPB mechanism so the piston can be pressed straight inward.
• Stop if the piston needs excessive force or the dust boot twists or balloons.

Step 9: Install the new pads

• Snap the new hardware clips securely into the bracket by hand.
• Apply a very thin film of silicone ceramic brake lubricant where the pad ears contact the clips.
• Install the inner and outer pads in their matching positions.
• Keep grease completely off the rotor and pad friction surfaces.

Step 10: Reinstall the caliper

• Lower the caliper over the new pads without twisting the hose.
• Start both slide bolts by hand to prevent cross-threading.
• Use the 14mm socket and 3/8-inch drive torque wrench to tighten both slide bolts to 25 Nm (18 ft-lbs).
• Repeat Steps 4 through 10 on the opposite rear wheel.

Step 11: Reinstall the rear wheels

• Mount each wheel and start all lug nuts by hand.
• Use the 21mm deep socket and 3/8-inch drive ratchet to snug the nuts in a star pattern.
• Raise your CX-5 slightly with the floor jack rated 2-ton minimum, remove the stands, and lower it until the tires touch the ground.
• Use the 21mm deep socket and 1/2-inch drive torque wrench to tighten the lug nuts in a star pattern to 108-147 Nm (80-108 ft-lbs).

Step 12: Seat the pads before restoring the EPB

• With the ignition OFF, press the brake pedal repeatedly by hand pressure until it becomes firm.
• Do not proceed if the pedal remains soft or sinks toward the floor.
• Check the reservoir and set the brake-fluid level between MIN and MAX.

Step 13: Exit EPB maintenance mode

• Keep your foot off the brake pedal and switch the ignition OFF.
• Fully depress and hold the accelerator pedal. Pull and hold the EPB switch upward.
• While holding both controls, switch the ignition ON without starting the engine within five seconds.
• Listen for both EPB motors operating and confirm the amber brake-system warning light goes out.
• Release the accelerator pedal and EPB switch.
• Apply and release the parking brake once while firmly holding the brake pedal.

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✅ After Repair

• ✅ Start the engine and confirm the brake pedal feels firm.
• ✅ Verify the red brake and amber EPB warning lights switch off.
• ✅ Apply and release the electric parking brake several times while stationary.
• ✅ Check behind both rear wheels for brake-fluid leaks.
• ✅ Perform a slow test in a safe area, checking braking before exceeding walking speed.
• ✅ Make several moderate stops from about 30 mph to bed the pads, allowing cooling time between stops.
• ✅ Avoid panic stops and holding the pedal hard while stationary for the first 150-200 miles unless safety demands it.
• ✅ Recheck lug-nut torque after approximately 50 miles.

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💰 DIY vs Shop Cost

Shop Cost: ₹12,000-₹25,000 for rear pads, labor, and inspection in the Sonīpat and Delhi NCR area

DIY Cost: Approximately $25-$75 for pads and consumables, excluding tools

You Save: Usually ₹6,000-₹15,000 by doing it yourself!

Local labor and imported-part prices vary. This repair takes a shop approximately 1-1.5 hours.

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