🔧 Legacy - Rear Brake Pads & Rotor Replacement

Replacing the rear brake pads and rotors restores braking power and prevents noise, vibration, and uneven wear. The key “gotcha” on your Legacy is whether it has an electronic parking brake (EPB), because EPB calipers must be put into service/maintenance mode before pushing the piston back.

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

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⚠️ Safety & Precautions

• 🛑 Support the car on jack stands before working underneath.
• 🔥 Brakes get hot—work only when fully cool.
• 🧴 Avoid breathing brake dust; use brake cleaner, not compressed air.
• ⚡ If you have an electronic parking brake, do not force the rear piston back until EPB service mode is activated.
• 🔋 Battery disconnect is not usually required, but keep the key/fob away from the car so the EPB can’t activate unexpectedly.

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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 (20–150 ft-lbs range)
• Breaker bar (1/2-inch drive)
• 19mm socket
• 14mm socket
• 17mm socket
• Ratchet (3/8-inch drive)
• Needle-nose pliers
• Flathead screwdriver
• C-clamp or brake caliper compression tool (specialty)
• Brake caliper hanger hook (specialty)
• Wire brush
• Brake cleaner spray
• Safety glasses
• Nitrile gloves

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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)
• Brake hardware kit (rear) - Qty: 1
• Brake caliper slide pin grease (silicone) - Qty: 1
• Brake anti-seize compound - Qty: 1

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📋 Before You Begin

• 🧭 Park on level ground, put the shifter in Park, and chock the front wheels.
• 🛠️ Loosen the rear lug nuts 1/2 turn with a 19mm socket and breaker bar before lifting.
• 🧪 Pop the hood and check the brake fluid level. If it’s at MAX, be ready to remove a little fluid as the pistons are pushed back.
• ⚡ If you have an electronic parking brake, you must use the correct EPB service/maintenance mode before compressing the piston.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Confirm parking brake type (EPB vs manual)

• Look between the front seats.
• If you have a small switch/button for the parking brake, that is EPB.
• If you have a hand lever, that is manual.

Step 2: Lift and secure the rear of the car

• Use a floor jack (rated 3-ton minimum) to lift at the proper rear jacking point.
• Set the car down onto jack stands (rated 3-ton minimum).
• Remove the rear wheels using a 19mm socket.

Step 3: Put the parking brake in the correct state

• Manual parking brake: make sure the lever is fully released.
• EPB: you must place the EPB into service/maintenance mode using a compatible scan tool function for “EPB Maintenance/Pad Replacement.”
• Don’t force the piston on EPB calipers.

Step 4: Remove the caliper (do not stretch the hose)

• Turn the steering slightly if needed for access.
• Remove the two caliper slide bolts using a 14mm socket and ratchet.
• Lift the caliper off the bracket.
• Support it with a brake caliper hanger hook (specialty) so it hangs from the suspension spring.

Step 5: Remove the old pads and hardware

• Pull the pads out of the bracket by hand or with a flathead screwdriver.
• Remove pad abutment clips (the stainless hardware) with a flathead screwdriver.
• Clean the bracket pad lands with a wire brush and brake cleaner spray.

Step 6: Remove the caliper bracket

• Remove the caliper bracket bolts using a 17mm socket and breaker bar.
• Set the bracket aside.

Step 7: Remove the rotor

• Pull the rotor straight off the hub.
• If it’s stuck, tap around the rotor “hat” with the handle end of a breaker bar (1/2-inch drive) while pulling.
• Clean the hub face with a wire brush, then spray with brake cleaner spray.
• Apply a very thin film of brake anti-seize compound to the hub face to prevent future sticking.

Step 8: Install the new rotor

• Clean both sides of the new rotor with brake cleaner spray to remove packing oil.
• Slide the rotor onto the hub.

Step 9: Reinstall the bracket and hardware

• Reinstall the caliper bracket using a 17mm socket and ratchet.
• Tighten bracket bolts with a torque wrench to the factory specification for your Legacy.
• Install new abutment clips from the hardware kit (snap them into the bracket).

Step 10: Compress the caliper piston

• Remove the caliper from the hanger and position it so you can see the piston.
• Use a C-clamp or brake caliper compression tool (specialty) to slowly push the piston back in.
• If fluid starts to overflow at the master cylinder, stop and remove a small amount before continuing.
• EPB: only compress after EPB service mode is active.

Step 11: Install new pads and reinstall the caliper

• Apply a light coat of brake caliper slide pin grease (silicone) to the slide pin contact areas and pad backing contact points (avoid pad friction material and rotor).
• Install the new pads into the bracket.
• Set the caliper over the pads and start the slide bolts by hand.
• Tighten the slide bolts using a 14mm socket and torque wrench to the factory specification for your Legacy.

Step 12: Reinstall wheels

• Reinstall wheels and hand-thread lug nuts.
• Lower the car off the stands using the floor jack (rated 3-ton minimum).
• Tighten lug nuts in a star pattern with a torque wrench: Torque to 120 Nm (88 ft-lbs).

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✅ After Repair

• 🦶 With the engine off, pump the brake pedal until it feels firm (this seats the pads).
• 🧴 Recheck brake fluid level and top off only if needed.
• ⚡ If you have EPB, exit EPB service/maintenance mode with your scan tool, then verify the EPB applies and releases normally.
• 🧪 Test drive at low speed first. Confirm no pulling, grinding, or warning lights.
• 🛑 Bedding-in (break-in): do 6–10 moderate stops from ~30 mph to ~5 mph, allowing short cool-down between stops.

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💰 DIY vs Shop Cost

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

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

You Save: $290-$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?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.