🔧 Sienna - Rear Brake Pad and Rotor Replacement

This repair replaces the rear brake pads and both rear rotors on your Sienna. Each rotor also serves as a drum for the mechanical parking-brake shoes, so the parking brake must be fully released before rotor removal.

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

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⚠️ Safety & Precautions

• ⚠️ Never work on your Sienna while it is supported only by a floor jack. Always use properly positioned jack stands.
• ⚠️ Chock both sides of a front tire before releasing the parking brake.
• ⚠️ Do not press the brake pedal while either rear caliper is removed.
• ⚠️ Suspend each caliper securely. Never let it hang from its flexible brake hose.
• ⚠️ Do not blow brake dust away with compressed air. Use brake cleaner and allow the residue to drain into a pan.
• ⚠️ Brake fluid damages paint. Clean spills immediately and prevent the reservoir from overflowing while compressing the pistons.
• Replace pads and rotors on both rear wheels for balanced braking.
• Battery disconnection is not required. Your Sienna has a mechanical foot-operated parking brake, so no scan-tool service mode is needed.

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🔧 Required Tools

You'll need the following tools for this repair:

• 21mm impact-rated socket
• 17mm six-point socket
• 14mm six-point socket
• 13mm six-point socket
• 3/8-inch-drive ratchet
• 1/2-inch-drive breaker bar
• 3/8-inch-drive torque wrench (10-80 ft-lbs)
• 1/2-inch-drive torque wrench (50-150 ft-lbs)
• 6-inch brake piston compression tool (specialty)
• 8mm x 1.25 rotor removal bolts, 40mm minimum length
• Small flat-blade screwdriver
• Medium flat-blade screwdriver
• Wire brake-parts brush
• 16-ounce rubber mallet
• Brake caliper hangers (specialty)
• 2-quart drain pan
• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Rubber wheel chocks
• 500-lumen flashlight
• Chemical-resistant nitrile gloves
• ANSI Z87.1 safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear brake pad set - Replace both sides - Qty: 1
• Rear brake rotors - Replace in pairs - Qty: 2
• Rear brake pad hardware kit - Qty: 1
• Rear brake pad wear indicators - Qty: 2
• Silicone brake caliper grease - Qty: 1 tube
• Brake cleaner - Qty: 2 cans
• DOT 3 brake fluid - Qty: 1 pint
• Lint-free shop towels - Qty: 1 pack

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📋 Before You Begin

• Park on firm, level pavement. Place the transmission in Park and switch off the engine.
• Use the wheel chocks to secure both sides of one front tire.
• Release the foot-operated parking brake completely. It must remain released during rotor removal.
• Use the flashlight to check the brake-fluid reservoir. If it is at MAX, remove a small amount before compressing the caliper pistons.
• Open the new parts and compare them with the original parts before installation. Rotor and pad dimensions must match.
• No infotainment menu, battery disconnection, electronic parking-brake mode, or scan tool is required.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the Rear Wheel Nuts

• Use the 21mm socket and 1/2-inch breaker bar to loosen each rear wheel nut approximately one-quarter turn.
• Do not remove the nuts while the tires are supporting the vehicle.

Step 2: Raise and Support the Rear

• Use the floor jack at the designated rear floor-jacking point shown in your Sienna owner’s manual.
• Raise the rear and position the jack stands under the designated left and right rear support points.
• Lower your Sienna gently onto the stands. Leave the floor jack touching the lift point as backup support.
• Push gently on the body to confirm it is stable before removing the wheels.

Step 3: Remove the Rear Wheels

• Use the 21mm socket and 3/8-inch ratchet to remove the wheel nuts and both rear wheels.
• Complete one side before disassembling the other side. The assembled side provides a useful reference.

Step 4: Remove the Brake Caliper

• Use the 14mm socket and 3/8-inch ratchet to remove the upper and lower caliper slide-pin bolts.
• Lift the caliper from the pads. If necessary, use the medium flat-blade screwdriver for gentle leverage only.
• Use a brake caliper hanger to suspend the caliper from the suspension without pulling or twisting its hose.

Step 5: Remove the Old Pads and Hardware

• Use the small flat-blade screwdriver to lift the inner and outer pads from the caliper bracket.
• Note the location of each wear indicator before removing the pads.
• Use the small flat-blade screwdriver to remove the stainless-steel pad-support clips from the bracket.

Step 6: Compress the Caliper Piston

• Use the flashlight to inspect the piston and its rubber dust boot. Stop if the boot is torn or brake fluid is present.
• Use the 6-inch brake piston compression tool to press the piston slowly and straight into the caliper.
• The rear piston presses directly inward; it does not need to be rotated.
• Use the flashlight to monitor the brake-fluid reservoir while compressing the piston. Stop before it overflows.
• Slow pressure prevents piston and seal damage.

Step 7: Remove the Caliper Bracket

• Use the 17mm socket and 1/2-inch breaker bar to remove the two caliper-bracket bolts.
• Remove the bracket and place it over the drain pan.
• Use brake cleaner and the wire brake-parts brush to clean the bracket surfaces beneath the support clips.

Step 8: Remove the Rear Rotor

• Confirm again that the parking brake is completely released.
• Pull the rotor straight from the hub by hand.
• If rust holds it in place, thread both 8mm x 1.25 rotor removal bolts into the rotor’s threaded holes.
• Use the 13mm socket and 3/8-inch ratchet to tighten the removal bolts alternately, one turn at a time.
• If the rotor moves outward but catches, stop. The internal parking-brake shoes are holding it.
• Align the rotor access hole with the parking-brake adjuster. Use the flashlight and small flat-blade screwdriver to retract the star wheel in small increments.
• Use the 16-ounce rubber mallet to tap the rotor hat between the wheel studs if necessary. Do not hit the studs or braking surfaces.

Step 9: Inspect the Parking-Brake Shoes

• Use the flashlight to inspect the parking-brake shoes, springs, pins, and adjuster located inside the rotor.
• Stop and replace the affected parts if a shoe lining is cracked, loose, contaminated, or approximately 1mm thick or less.
• Use brake cleaner over the drain pan to wash away loose dust. Do not use compressed air.

Step 10: Clean the Hub and New Rotor

• Use the wire brake-parts brush to remove rust from the hub face. Do not damage the wheel-stud threads.
• Use brake cleaner and lint-free shop towels to remove protective oil from both sides of the new rotor.
• Wear nitrile gloves to avoid transferring oil onto the clean braking surfaces.

Step 11: Install the New Rotor

• Slide the rotor over the wheel studs by hand and seat it completely against the hub.
• If it will not pass over the parking-brake shoes, use the small flat-blade screwdriver to retract the star-wheel adjuster slightly.
• Temporarily install two wheel nuts by hand to hold the rotor flush against the hub.
• Do not force the rotor over the parking-brake shoes.

Step 12: Clean and Lubricate the Slide Pins

• Pull the slide pins and rubber boots from the caliper bracket by hand. Keep the upper and lower parts in their original locations.
• Use brake cleaner and lint-free shop towels to remove the old grease.
• Apply a thin layer of silicone brake caliper grease to the smooth portion of each slide pin.
• Reinstall each pin by hand and make sure its rubber boot seats completely in the bracket groove.
• Move each pin by hand to verify it slides smoothly.

Step 13: Reinstall the Caliper Bracket

• Position the bracket over the rotor and start both mounting bolts by hand to prevent crossed threads.
• Use the 17mm socket and 1/2-inch torque wrench to tighten both bracket bolts to 104 Nm (77 ft-lbs).

Step 14: Install the New Hardware and Pads

• Press the new stainless-steel support clips fully into the cleaned bracket by hand.
• Apply a very thin layer of silicone brake caliper grease where the pad ears touch the support clips.
• Keep all grease away from the pad friction material and rotor surfaces.
• Install the inner and outer pads by hand.
• Install the new wear indicators in the same positions and orientations as the original indicators.
• Move the pads by hand and confirm they slide smoothly in the bracket.

Step 15: Reinstall the Caliper

• Remove the caliper from its hanger and position it over the new pads by hand.
• Do not force it. If it does not fit, use the 6-inch brake piston compression tool to compress the piston farther.
• Start both slide-pin bolts by hand.
• Use the 14mm socket and 3/8-inch torque wrench to tighten the slide-pin bolts to 34 Nm (25 ft-lbs).
• Use the flashlight to confirm the brake hose is not twisted and both slide-pin boots are seated.

Step 16: Complete the Opposite Side

• Use the same listed tools and repeat Steps 4 through 15 on the opposite rear wheel.
• Compare the pad, clip, and wear-indicator arrangement with the completed side before installing the second caliper.

Step 17: Reinstall and Torque the Wheels

• Use the 21mm socket and 3/8-inch ratchet to remove the two temporary wheel nuts from each rotor.
• Install both wheels and start every wheel nut by hand.
• Use the 21mm socket and 3/8-inch ratchet to snug the nuts in a crisscross pattern.
• Use the floor jack to raise your Sienna, remove the jack stands, and lower the tires onto the ground.
• Use the 21mm socket and 1/2-inch torque wrench to tighten the wheel nuts in a crisscross pattern to 103 Nm (76 ft-lbs).

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✅ After Repair

• Before moving your Sienna, press and release the brake pedal repeatedly until it feels firm.
• Use the flashlight to check the brake-fluid reservoir. Add fresh DOT 3 brake fluid only if the level is below the proper range.
• Apply and release the parking brake several times. Confirm it holds the vehicle securely before relying on it.
• Start the engine and confirm the brake warning light turns off.
• Test the brakes at walking speed in a clear area. Confirm the pedal remains firm and your Sienna stops straight.
• Bed in the pads with approximately eight moderate stops from 50 km/h to 10 km/h. Allow space between stops and avoid holding the hot brakes at a complete stop.
• Drive for approximately 10 minutes with minimal braking afterward to let the brakes cool.
• Avoid unnecessary hard braking for the first 300 km.
• After 80-160 km, use the 21mm socket and 1/2-inch torque wrench to recheck the wheel nuts at 103 Nm (76 ft-lbs).

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💰 DIY vs Shop Cost

Shop Cost: ₹35,000-₹70,000 (parts + labor)

DIY Cost: ₹18,000-₹40,000 (parts only)

You Save: ₹17,000-₹30,000 by doing it yourself!

Labor and imported-parts pricing around Sonīpat can vary significantly. A shop typically needs approximately 2-3 hours for this repair.

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