🔧 Outback - Rear Brake Pad & Rotor Replacement

This repair replaces the rear brake pads and rear brake rotors on your Outback. The rear caliper must be removed, the caliper piston compressed, and the parking brake drum surface inside the rotor must be handled carefully.

Difficulty Level: Beginner-Intermediate | Estimated Time: 2-3 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a flat, solid surface only. Never rely on a jack alone.
• ⚠️ Support your Outback with jack stands. Jack stands are metal safety supports that hold the vehicle up after lifting.
• ⚠️ Chock the front wheels so the vehicle cannot roll.
• ⚠️ Release the parking brake before removing the rear rotors. The parking brake shoes sit inside the rear rotor “hat.”
• ⚠️ Do not press the brake pedal while a caliper is removed.
• ⚠️ Brake dust can be harmful. Use brake cleaner, not compressed air.
• ⚠️ Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• 19mm lug nut socket
• 14mm socket
• 17mm socket
• 3/8-inch ratchet
• 1/2-inch breaker bar
• Torque wrench rated 20-100 ft-lbs
• Floor jack rated 2-ton minimum
• Jack stands rated 2-ton minimum
• Wheel chocks
• C-clamp 6-inch
• Disc brake pad spreader tool
• Flathead screwdriver medium
• Needle-nose pliers
• Wire brush
• Rubber mallet
• M8 x 1.25 bolts
• Brake cleaner aerosol
• 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 - Qty: 1
• Brake lubricant - Qty: 1
• Brake cleaner - Qty: 1-2 cans

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📋 Before You Begin

• 🅿️ Park your Outback on level ground.
• 🛑 Put the manual transmission in 1st gear.
• 🛞 Place wheel chocks in front of both front tires.
• 🔓 Release the parking brake fully before lifting the rear.
• 🧴 Open the hood and check the brake fluid level. If it is near the MAX line, remove a small amount with a clean suction tool before compressing the caliper pistons.
• 📌 A caliper is the clamp that squeezes the brake pads against the rotor. The rotor is the round metal disc behind the wheel.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the Rear Lug Nuts

• Use a 19mm lug nut socket and 1/2-inch breaker bar to loosen each rear lug nut about half a turn.
• Do this while the tires are still touching the ground.
• Loose first, lift second.

Step 2: Lift and Support the Rear

• Use a floor jack rated 2-ton minimum to lift the rear of your Outback at the rear differential lift area.
• Place jack stands rated 2-ton minimum under the rear side support points.
• Lower the vehicle gently onto the jack stands.
• Lightly shake the vehicle by hand to confirm it is stable.

Step 3: Remove the Rear Wheels

• Use the 19mm lug nut socket and 3/8-inch ratchet to remove the loosened lug nuts.
• Remove both rear wheels and set them flat on the ground.

Step 4: Remove the Rear Caliper

• Use a 14mm socket and 3/8-inch ratchet to remove the two rear caliper slide pin bolts.
• Lift the caliper off the bracket.
• Support the caliper so it does not hang from the rubber brake hose.
• Use a box, bucket, or safe support to hold it close to the suspension.

Step 5: Remove the Old Brake Pads

• Pull the old brake pads out of the caliper bracket by hand.
• Use a flathead screwdriver medium only if a pad is stuck.
• Note the position of any shims or wear indicators before removal.
• A shim is a thin backing plate that helps reduce brake noise.

Step 6: Remove the Caliper Bracket

• Use a 17mm socket and 1/2-inch breaker bar to remove the two caliper bracket bolts.
• Remove the caliper bracket from the rear knuckle.
• These bolts can be tight, so keep the socket straight to avoid rounding the bolt heads.

Step 7: Remove the Rear Rotor

• Make sure the parking brake is fully released.
• Pull the rotor straight off by hand.
• If the rotor is stuck, thread two M8 x 1.25 bolts evenly into the rotor removal holes.
• Turn each bolt a little at a time with a 3/8-inch ratchet until the rotor pops loose.
• If needed, tap the rotor hat gently with a rubber mallet.
• Do not hammer the wheel studs.

Step 8: Clean the Hub Surface

• Use a wire brush to clean rust from the wheel hub face.
• Spray the area with brake cleaner aerosol and wipe it with shop towels.
• The new rotor must sit flat against the hub to avoid brake vibration.
• Clean hub equals smooth braking.

Step 9: Install the New Rotor

• Clean both sides of the new rotor with brake cleaner aerosol and shop towels.
• Slide the new rotor onto the hub.
• Install one lug nut by hand backward to hold the rotor flat while you work.
• Spin the rotor by hand. It should rotate without heavy dragging from the parking brake shoes.

Step 10: Service the Caliper Bracket

• Use a flathead screwdriver medium or needle-nose pliers to remove the old brake hardware clips from the bracket.
• Use a wire brush to clean the bracket lands where the clips sit.
• Install the new hardware clips by hand.
• Apply a thin layer of brake lubricant to the pad contact points on the hardware clips.
• Do not put lubricant on the pad friction material or rotor face.

Step 11: Reinstall the Caliper Bracket

• Place the caliper bracket over the new rotor.
• Start both bracket bolts by hand to avoid cross-threading.
• Use a 17mm socket and torque wrench rated 20-100 ft-lbs to tighten the bracket bolts.
• Torque to 88 Nm (65 ft-lbs)

Step 12: Compress the Caliper Piston

• Place an old brake pad against the caliper piston.
• Use a C-clamp 6-inch or disc brake pad spreader tool to slowly push the piston fully back into the caliper.
• Compress slowly so brake fluid can return safely to the master cylinder.
• Watch the brake fluid reservoir under the hood so it does not overflow.

Step 13: Install the New Brake Pads

• Apply a thin layer of brake lubricant to the pad ears where they touch the hardware clips.
• Install the inner and outer pads into the caliper bracket by hand.
• Make sure the pad friction material faces the rotor.
• The pads should slide smoothly in the bracket.

Step 14: Reinstall the Caliper

• Slide the caliper over the new pads.
• Start both caliper slide pin bolts by hand.
• Use a 14mm socket and torque wrench rated 20-100 ft-lbs to tighten the caliper slide pin bolts.
• Torque to 27 Nm (20 ft-lbs)

Step 15: Repeat on the Other Side

• Use the same tools and steps to replace the pads and rotor on the opposite rear side.
• Rear brake pads and rotors should be replaced in pairs for even braking.

Step 16: Reinstall the Wheels

• Remove the temporary lug nut holding each rotor.
• Install the wheels by hand.
• Thread all lug nuts by hand first.
• Use the 19mm lug nut socket and 3/8-inch ratchet to snug the lug nuts in a star pattern.

Step 17: Lower and Torque the Wheels

• Use the floor jack rated 2-ton minimum to lift the rear slightly off the jack stands.
• Remove the jack stands rated 2-ton minimum.
• Lower your Outback until the tires touch the ground.
• Use the 19mm lug nut socket and torque wrench rated 20-100 ft-lbs to tighten the lug nuts in a star pattern.
• Torque to 120 Nm (89 ft-lbs)

Step 18: Pump the Brake Pedal

• Before moving the vehicle, press the brake pedal slowly 5-10 times.
• The pedal should become firm.
• This seats the caliper pistons against the new pads.
• Check the brake fluid level and top off only if needed.

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✅ After Repair

• ✅ Start your Outback and press the brake pedal again. It should feel firm, not sink to the floor.
• ✅ Test the parking brake on a slight incline after the brake pedal is firm.
• ✅ Drive slowly in a safe area and confirm the brakes stop smoothly.
• ✅ Perform a gentle break-in: make 8-10 moderate stops from about 30 mph to 10 mph, letting the brakes cool briefly between stops.
• ✅ Avoid hard braking for the first 200 miles unless it is an emergency.
• ✅ Recheck lug nut torque after your first short drive.

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💰 DIY vs Shop Cost

Shop Cost: $350-$600 (parts + labor)

DIY Cost: $120-$260 (parts only)

You Save: $230-$340 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.0 hours.

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🎯 Ready to get started?

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