🔧 Sienna - Rear Brake Pads & Rotor Replacement

You’ll be removing the rear wheels, taking off the rear brake calipers, swapping the pads and rotors, then reassembling everything with the correct torque. Your Sienna uses rear disc brakes with a small drum-style parking brake inside the rotor “hat,” so a stuck rotor is usually caused by the parking brake shoes.

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

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⚠️ Safety & Precautions

• 🛑 Work on level ground and chock the front wheels before lifting the rear.
• 🔥 Brakes can be extremely hot; let everything cool before starting.
• 🧍‍♂️ Never get under a vehicle supported only by a jack—use jack stands.
• 🧪 Avoid breathing brake dust; use brake cleaner, not compressed air.
• 🅿️ Make sure the parking brake is fully released before rotor removal.

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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
• Torque wrench (20-150 ft-lbs range)
• Ratchet
• 14mm socket
• 17mm socket
• C-clamp (6-inch minimum)
• Bungee cord
• Flathead screwdriver
• Rubber mallet
• Wire brush
• Brake parts cleaner
• M8 x 1.25 bolts (2-3 inch length)
• 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 - Qty: 2
• Rear brake pad hardware kit (clips) - Qty: 1
• Brake grease (silicone) - Qty: 1
• Brake cleaner - Qty: 1
• Anti-seize compound - Qty: 1

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📋 Before You Begin

• Park on level ground, steering straight, and keep the transmission in P.
• Release the parking brake fully.
• Crack the rear lug nuts loose with a 21mm socket and breaker bar before lifting.
• Lift the rear and support with jack stands under the proper rear support points.
• Open the hood and check brake fluid level; if it’s near “MAX,” be ready to remove a little (fluid rises when you compress pistons).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the rear wheels

• Use a 21mm socket to remove the lug nuts and remove the wheel.
• Set the wheel under the van as an extra safety backup.
• When reinstalling later: Torque to 140 Nm (103 ft-lbs) using a torque wrench.

Step 2: Remove the rear brake caliper

• Locate the caliper (the “clamp” that squeezes the pads).
• Use a 14mm socket and ratchet to remove the 2 caliper slide pin bolts.
• Lift the caliper off and hang it with a bungee cord.
• Do not let the caliper hang by the brake hose.
• Reinstall later: Torque to 34 Nm (25 ft-lbs).

Step 3: Remove the pads and hardware

• Pull the old pads out by hand.
• Remove the stainless pad clips (hardware) from the bracket using a flathead screwdriver.
• Spray the bracket pad lands with brake parts cleaner and scrub with a wire brush.
• Clean metal helps pads slide smoothly.

Step 4: Remove the caliper bracket

• The caliper bracket is the heavy metal mount the caliper bolts to.
• Use a 17mm socket and breaker bar to remove the 2 bracket bolts.
• Reinstall later: Torque to 90 Nm (66 ft-lbs).

Step 5: Remove the rotor (and deal with a stuck rotor if needed)

• Try pulling the rotor straight off by hand.
• If it’s stuck, tap around the rotor hat with a rubber mallet to break rust loose.
• If it’s still stuck, thread two M8 x 1.25 bolts into the rotor “jacking” holes and tighten evenly with a ratchet until the rotor pops free.
• If the rotor won’t come off because of the parking brake shoes, make sure the parking brake is released, then use a flathead screwdriver through the access slot to back off the star wheel adjuster (loosen) until the rotor slides off.

Step 6: Prep the hub and install the new rotor

• Clean the hub face with a wire brush and brake parts cleaner.
• Apply a very thin film of anti-seize compound to the hub face (not the wheel studs).
• Install the new rotor onto the hub.
• To hold the rotor while you work, temporarily install 1-2 lug nuts hand-tight using the 21mm socket.

Step 7: Reinstall the caliper bracket and new pad hardware

• Reinstall the caliper bracket using the 17mm socket.
• Torque to 90 Nm (66 ft-lbs) using a torque wrench.
• Install the new pad hardware clips into the bracket by hand.
• Apply a thin layer of brake grease (silicone) where the pad ears touch the clips.
• Do not get grease on the pad friction material or rotor surface.

Step 8: Compress the caliper piston

• Before compressing, place an old pad against the piston face.
• Use a C-clamp (6-inch minimum) to slowly press the piston back in until it’s fully seated.
• Go slowly and watch the brake fluid reservoir so it doesn’t overflow.
• Slow compression protects seals.

Step 9: Install new pads and reinstall the caliper

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

Step 10: Repeat on the other rear side

• Repeat Steps 1–9 on the other rear wheel.
• Replace rear pads and rotors as a pair (left and right) for even braking.

Step 11: Reinstall wheels and torque lug nuts

• Reinstall the wheels and hand-tighten the lug nuts using a 21mm socket.
• Lower the van and torque lug nuts in a star pattern with a torque wrench.
• Torque to 140 Nm (103 ft-lbs).

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✅ After Repair

• With the engine off, slowly pump the brake pedal until it feels firm (this seats the pistons).
• Check brake fluid level and top off only if needed.
• Test the parking brake on a gentle incline to confirm it holds.
• Road test at low speed first, listening for scraping or clicking.
• Pad break-in: make 8-10 moderate stops from 30–35 mph, allowing short cool-down between stops.

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💰 DIY vs Shop Cost

Shop Cost: $350-$750 (parts + labor) (≈ ₹29,000-₹62,000)

DIY Cost: $120-$320 (parts only) (≈ ₹10,000-₹27,000)

You Save: $230-$430 by doing it yourself! (≈ ₹19,000-₹36,000)

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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