🔧 Prius - Rear Brake Pads & Rotor Replacement

On your Prius, rear brake pads and rotors are a straightforward bolt-on service: remove the caliper, swap pads, and replace the rotor. The big “gotchas” are supporting the caliper so the hose isn’t strained, and making sure the parking brake is fully released before pushing the piston back.

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

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⚠️ Safety & Precautions

• 🛑 Work on a level surface; use jack stands—never rely on a jack alone.
• 🧤 Brakes create dust; wear gloves and safety glasses. Avoid blowing dust with air.
• 🔥 Rotors can be hot if you just drove; let everything cool.
• 🔌 Hybrid note: avoid touching any orange high-voltage cables; this brake job does not require HV system work.
• 🅿️ Make sure the parking brake is fully released before retracting the rear caliper piston.

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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
• Torque wrench (10-150 ft-lbs range)
• 21mm socket
• Ratchet (3/8" drive)
• Breaker bar (1/2" drive)
• 14mm socket
• 17mm socket
• C-clamp piston compressor
• Flat-blade screwdriver
• Wire brush
• Bungee cord
• Rubber mallet
• Micrometer or vernier caliper (specialty)
• Brake cleaner spray
• High-temp silicone brake grease
• Disposable shop towels
• 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
• Rear brake hardware kit (clips/shims) - Qty: 1
• Brake cleaner - Qty: 1
• High-temp silicone brake grease - Qty: 1

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📋 Before You Begin

• Park on level ground, put the shifter in P, and place wheel chocks at the front wheels.
• Release the parking brake fully (on your Prius it’s typically the foot-operated parking brake pedal).
• Crack the rear lug nuts loose 1/2 turn using a 21mm socket and breaker bar before lifting.
• Lift the rear with a floor jack and support with jack stands at the proper rear support points.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the rear wheels

• Use a 21mm socket and ratchet to remove the lug nuts and take the wheel off.
• Set the wheel under the car as an extra safety backup.

Step 2: Locate the rear caliper and remove the caliper bolts

• Turn the steering wheel is not needed for the rear; just position yourself for access.
• Use a 14mm socket and ratchet to remove the two caliper slide-pin bolts (upper and lower).
• Lift the caliper off the bracket and hang it with a bungee cord. Never hang by the hose.

Step 3: Remove the old pads and hardware

• Use a flat-blade screwdriver to carefully pry the pads out if they’re stuck.
• Remove the pad clips/hardware from the bracket.
• Clean the bracket’s pad “tracks” with brake cleaner spray and a wire brush until the clips sit flat.

Step 4: Retract (push back) the caliper piston

• Place one old pad against the piston face.
• Use a C-clamp piston compressor to slowly push the piston back into the caliper.
• If the piston won’t retract, re-check that the parking brake is fully released.

Step 5: Remove the caliper bracket to free the rotor

• Use a 17mm socket and breaker bar to remove the two caliper bracket bolts.
• Remove the bracket and set it aside.
• Torque note: These bracket bolts are high-torque fasteners—use a torque wrench on reassembly and follow Toyota’s specification for your Prius.

Step 6: Remove the rotor

• Pull the rotor straight off the hub.
• If it’s stuck from rust, tap around the rotor hat using a rubber mallet to break it loose.
• Clean the hub face with a wire brush and brake cleaner spray so the new rotor sits flat. Flat hub = no brake shake.

Step 7: Install the new rotor

• Spray both sides of the new rotor with brake cleaner spray and wipe with shop towels to remove protective oil.
• Install the rotor onto the hub.

Step 8: Reinstall the caliper bracket and new hardware

• Reinstall the bracket and start bolts by hand, then tighten using a 17mm socket.
• Install new pad clips/hardware into the bracket.
• Apply a thin film of high-temp silicone brake grease where the pad ears slide on the clips (not on rotor/pad friction surfaces).

Step 9: Install the new pads

• Slide the new inner/outer pads into the bracket by hand.
• If your pad set includes shims, install them as provided with the kit.

Step 10: Reinstall the caliper

• Lower the caliper over the new pads.
• If the slide pins feel sticky, clean and lightly grease them with high-temp silicone brake grease.
• Install the caliper slide-pin bolts using a 14mm socket, then tighten with a torque wrench to Toyota spec for your Prius.

Step 11: Reinstall wheels and torque lug nuts

• Put the wheel back on and hand-thread all lug nuts.
• Lower the car enough that the tire just touches the ground and won’t spin.
• Tighten lug nuts in a star pattern using a torque wrench: Torque to 103 Nm (76 ft-lbs).

Step 12: Repeat on the other rear side

• Do the exact same steps for the other rear wheel.
• Replace rear pads/rotors as a pair (left and right).

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✅ After Repair

• With the car in P, press the brake pedal slowly 10-15 times until it feels firm. This seats the pistons against the pads.
• Re-apply and release the parking brake a few times to confirm normal operation.
• Do a cautious test drive: low-speed stops first, then normal stops. Listen for grinding or metal-to-metal sounds.
• Check for fluid leaks around each caliper and confirm nothing is rubbing.
• Tip: Avoid hard stops for the first 150-200 miles if possible.

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💰 DIY vs Shop Cost

Shop Cost: $450-$850 (parts + labor)

DIY Cost: $140-$320 (parts only)

You Save: $310-$530 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.5 hours.

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🎯 Ready to get started?

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