🔧 Mustang - Rear Brake Pads & Rotor Replacement

You’ll remove the rear wheels, take off the rear brake calipers and brackets, swap the rotors, then install new pads and hardware. On your Mustang, the rear brakes may use an electronic parking brake (EPB), which must be put into a service mode before pushing the caliper pistons back.

Difficulty Level: Intermediate | Estimated Time: 2.0-4.0 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a flat surface and support the car with jack stands—never rely on a jack alone.
• ⚠️ If equipped with EPB, do NOT force the rear pistons back until EPB is in service mode (you can damage the caliper motor).
• ⚠️ Brake dust is harmful—wear a dust mask and use brake cleaner, not compressed air.
• ⚠️ Brake parts get hot—let everything cool before touching.
• ⚠️ Do not press the brake pedal with a caliper removed.

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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 (20–250 ft-lbs range)
• Ratchet (3/8")
• Ratchet (1/2")
• Socket set (8mm–21mm)
• Wrench set (8mm–21mm)
• Large C-clamp (6")
• Brake caliper piston tool (specialty)
• Flathead screwdriver
• Pick tool
• Wire brush
• Rubber mallet
• Bungee cord
• Brake cleaner spray
• Nitrile gloves
• Safety glasses
• Dust mask

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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 pad hardware/clip kit - Qty: 1
• Brake lubricant (silicone/ceramic) - Qty: 1
• Brake cleaner - Qty: 1
• DOT 4 brake fluid - Qty: 1 quart

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📋 Before You Begin

• Park your Mustang on level ground, set the transmission to P, and chock the front wheels.
• Loosen the rear wheel lug nuts slightly using a 21mm socket and breaker bar before lifting.
• Confirm whether you have electronic parking brake (EPB): look for a small parking brake switch/button on the console (not a hand lever).
• “Brake caliper piston tool” compresses the piston safely.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Put the rear EPB into service mode (if equipped)

• If your Mustang has an EPB switch, use one of these methods:
• Method A (scan tool): Use a capable scan tool with Ford service functions to command Rear EPB > Brake Service Mode. Safest and most reliable.
• Method B (manual procedure): If you don’t have a scan tool, tell me whether your dash says “Maintenance Mode” when you try the EPB sequence—there are 2 common Ford variants and I don’t want you to get stuck.

Step 2: Lift the rear and remove both rear wheels

• Lift the rear using a floor jack at the correct rear jacking point, then place jack stands under solid rear support points.
• Remove the lug nuts using a 21mm socket and ratchet.

Step 3: Remove the rear caliper (do not hang it by the hose)

• Turn the steering wheel slightly if it helps access (rear access is usually straight-on).
• Remove the caliper guide/slide pin bolts using the correctly-fitting socket from your socket set and hold the slide pin with a matching wrench if it tries to spin.
• Lift the caliper off the bracket and support it with a bungee cord.

Step 4: Remove the old pads and inspect hardware

• Pull the pads out of the bracket by hand; use a flathead screwdriver if they’re stuck.
• Remove the pad clips/hardware using a pick tool.
• Clean the bracket pad lands (where clips sit) with a wire brush and brake cleaner spray.

Step 5: Remove the caliper bracket

• Remove the caliper bracket bolts using a breaker bar and correctly-fitting socket (these are usually tight).
• Set the bracket aside.

Step 6: Remove the rotor

• If the rotor is stuck to the hub, spray the hub center with brake cleaner spray and tap the rotor hat evenly using a rubber mallet.
• Clean rust off the hub face using a wire brush. A clean hub prevents vibration.

Step 7: Install the new rotor

• Clean the new rotor friction surfaces using brake cleaner spray (removes protective oil).
• Place the rotor onto the hub. Hold it in place with one lug nut hand-threaded if needed.

Step 8: Reinstall the caliper bracket

• Install bracket bolts by hand first, then tighten using a ratchet.
• Final tighten using a torque wrench: Torque to 115 Nm (85 ft-lbs).

Step 9: Install new pad hardware and pads

• Install new pad clips into the bracket using your hands (use a flathead screwdriver gently if needed).
• Apply a thin film of brake lubricant where the pad ears touch the clips (metal-to-metal contact points only).
• Install the new pads into the bracket.

Step 10: Compress the rear caliper piston

• Check the brake fluid level under the hood; if it’s near “MAX,” remove a little with a clean syringe/turkey baster (not a tool requirement—only if you already have one).
• Compress the piston using a brake caliper piston tool (specialty) (or a large C-clamp if your piston face is smooth and compresses straight).
• If the piston will not compress smoothly, stop and confirm EPB is in service mode.

Step 11: Reinstall the caliper

• Place the caliper over the new pads.
• Install the slide pin bolts using the correctly-fitting socket and hold the pin with a wrench if needed.
• Final tighten using a torque wrench: Torque to 35 Nm (26 ft-lbs).

Step 12: Repeat on the other rear side

• Repeat Steps 3–11 on the other rear wheel.
• Always replace pads/rotors in pairs.

Step 13: Reinstall wheels and lower the car

• Install wheels and hand-thread lug nuts.
• Lower off the jack stands using the floor jack.
• Tighten lug nuts in a star pattern with a torque wrench: Torque to 203 Nm (150 ft-lbs).

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✅ After Repair

• Pump the brake pedal 10–15 times until it feels firm (use normal foot pressure).
• If equipped with EPB, exit service mode (scan tool) or complete the dash prompt to return to normal operation.
• Check brake fluid level and top off with DOT 4 brake fluid if needed.
• Do a cautious road test: verify no pulling, grinding, or warning lights.
• Pad break-in (recommended): 6–10 medium stops from 40→10 mph, letting brakes cool between stops. No full panic stops at first.

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💰 DIY vs Shop Cost

Shop Cost: $600-$1,050 (parts + labor)

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

You Save: $380-$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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