🔧 Prius - Front Brake Pads & Rotor Replacement

You’ll remove the front wheels, take the brake calipers and brackets off, replace the rotors, and install new pads with fresh hardware. This restores braking performance and prevents vibration/pulsation caused by warped or worn rotors.

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

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⚠️ Safety & Precautions

• Work on a flat, solid surface and support the car with jack stands before going under or pulling on suspension/brake parts.
• Wear safety glasses and a dust mask; brake dust and rust can fall when parts come off.
• Do not press the brake pedal with the caliper removed; the piston can pop out and leak fluid.
• Never let the caliper hang by the brake hose; support it with a strap to prevent hose damage.
• Hybrid note: Keep the car OFF and the key/fob away from the vehicle while working so the system can’t “wake up.” Battery disconnect is not required for this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• 21mm socket
• 14mm socket
• 17mm socket
• 3/8" drive ratchet
• 1/2" drive breaker bar
• Torque wrench (10-200 Nm range)
• C-clamp or disc brake piston compressor (specialty)
• Bungee cord
• Flat-blade screwdriver
• Rubber mallet
• M8 x 1.25 bolts (pair, 25-40mm long)
• Wire brush
• Brake parts cleaner
• High-temp silicone brake grease
• Shop towels
• Nitrile gloves
• Safety glasses
• Dust mask

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front brake pad set - Qty: 1
• Front brake rotors - Qty: 2
• Front pad hardware/abutment clip kit - Qty: 1
• Brake pad shim kit - Qty: 1
• Brake fluid (DOT 3) - Qty: 1 quart

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📋 Before You Begin

• Park on level ground, shift to P, and set the parking brake.
• Chock the rear wheels using wheel chocks.
• Open the hood and remove the brake master cylinder cap (leave it sitting on top). This helps fluid move back when you compress pistons.
• Put on gloves, safety glasses, and a dust mask.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen lug nuts and lift the front

• Use a 21mm socket and breaker bar to loosen the front lug nuts 1/2 turn (do not remove yet).
• Lift the front with a floor jack at the front center jacking point, then place jack stands at the proper support points.
• Lower onto the jack stands and give the car a firm shake to confirm it’s stable.

Step 2: Remove the front wheels

• Remove lug nuts using the 21mm socket and ratchet.
• Remove both front wheels and set them aside.

Step 3: Remove the brake caliper (keep it supported)

• Turn the steering to give more working room (left side: turn steering right; right side: turn steering left).
• Use a 14mm socket and ratchet to remove the two caliper slide pin bolts.
• Lift the caliper off the bracket and support it with a bungee cord.
• Don’t twist or stretch the brake hose.

Step 4: Remove old pads and hardware

• Pull the brake pads out of the bracket by hand.
• Remove the stainless pad clips (called abutment clips; they’re the “rails” the pads slide on) using a flat-blade screwdriver.
• Clean the bracket pad lands with a wire brush and spray with brake parts cleaner, then wipe with shop towels.

Step 5: Remove the caliper bracket

• The caliper bracket is the larger fixed piece the caliper rides on.
• Use a 17mm socket and breaker bar to remove the two caliper bracket bolts.
• Set the bracket aside.

Step 6: Remove the rotor

• If the rotor is stuck, thread two M8 x 1.25 bolts into the rotor’s push-off holes and tighten evenly with a ratchet until the rotor pops loose. (These bolts “jack” the rotor off the hub.)
• If needed, tap the rotor hat with a rubber mallet to help break rust free.
• Remove the rotor.

Step 7: Prep the hub and install the new rotor

• Use a wire brush to clean rust from the hub face (where the rotor sits).
• Spray the hub and new rotor with brake parts cleaner to remove rust/packing oil, then wipe with shop towels.
• Install the new rotor onto the hub. Hold it in place with one lug nut hand-tight if you want it steady during assembly.

Step 8: Reinstall the caliper bracket

• Position the bracket over the new rotor and start both bolts by hand.
• Tighten using a 17mm socket and torque wrench.
• Torque to 107 Nm (79 ft-lbs).

Step 9: Install new pad clips and grease contact points

• Install new abutment clips into the bracket by hand (they should snap/seat flat).
• Apply a thin film of high-temp silicone brake grease where the pads touch the clips (metal-to-metal sliding points only).
• Keep grease off pad friction material.

Step 10: Compress the caliper piston

• Use a C-clamp or disc brake piston compressor (specialty) to slowly push the piston back into the caliper.
• Watch the brake fluid level at the master cylinder; if it rises too high, remove a little with shop towels (do not spill on paint).
• Definition: the piston is the round part that pushes the inner pad.

Step 11: Install new pads and shims

• Install the pad shims (if your pad set uses them) onto the backs of the pads.
• Apply a thin layer of high-temp silicone brake grease to the pad backing plates where they contact the caliper/piston (not on the pad surface).
• Slide the new pads into the bracket on the new clips.

Step 12: Reinstall the caliper

• Place the caliper over the new pads.
• Install the slide pin bolts using a 14mm socket and torque wrench.
• Torque to 34 Nm (25 ft-lbs).

Step 13: Repeat on the other side

• Repeat Steps 3 through 12 on the other front wheel.
• Do one side at a time to compare.

Step 14: Reinstall wheels and torque lug nuts

• Install the wheels and hand-thread all lug nuts.
• Lower the vehicle off the jack stands using the floor jack.
• Torque lug nuts in a star pattern using a 21mm socket and torque wrench.
• Torque to 103 Nm (76 ft-lbs).

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✅ After Repair

• With the car still in P, pump the brake pedal slowly 10-15 times until it feels firm. This seats the pads against the rotors.
• Reinstall the master cylinder cap and check brake fluid level; top off with DOT 3 only if needed.
• Test at low speed first. Confirm no pulling, grinding, or warning lights.
• Pad bedding (break-in): do 6-10 moderate stops from 30-40 mph down to 5 mph, with 30-60 seconds between stops to cool. Avoid hard stops for the first ~200 miles.

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💰 DIY vs Shop Cost

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

DIY Cost: $160-$350 (parts only)

You Save: $290-$450 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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