🔧 Sienna - Front Brake Pad Replacement

Your Sienna’s front brake pads sit inside the front brake calipers and press against the rotors to slow the van. Replacing worn pads restores braking performance and prevents rotor damage from metal-to-metal contact.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours

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⚠️ Safety & Precautions

• 🛑 Support the van with jack stands—never rely on a jack alone.
• 🛑 Brake dust is harmful; avoid blowing it with air—use brake cleaner instead.
• 🛑 Brakes can be hot; let the brakes cool before touching calipers/rotors.
• 🛑 Do not press the brake pedal while the caliper is off the rotor.
• 🛑 Watch the brake fluid level when compressing pistons; remove excess if it nears overflow.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (pair, rated 3-ton minimum)
• Wheel chocks
• 21mm socket
• 1/2" drive breaker bar
• 1/2" drive torque wrench (20-200 ft-lbs range)
• 14mm socket
• 17mm socket
• 3/8" drive ratchet
• 6" extension (3/8" drive)
• C-clamp brake piston compressor
• Flathead screwdriver
• Needle-nose pliers
• Wire hook or bungee cord
• Brake cleaner spray
• Shop towels
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front brake pad set - Qty: 1
• Front brake pad hardware kit (abutment clips) - Qty: 1
• Brake caliper slide pin grease (silicone brake grease) - Qty: 1
• Brake cleaner - Qty: 1
• Brake fluid (DOT 3) - Qty: 1 bottle

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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.
• Crack the front lug nuts loose 1/2 turn with a 21mm socket and breaker bar before lifting.
• Open the hood and locate the brake fluid reservoir; you’ll re-check the level after pushing the pistons back.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the front end

• Lift the front using a floor jack (rated 3-ton minimum) at the proper front jacking point.
• Set the van down onto jack stands (pair, rated 3-ton minimum).
• Remove the front wheels using a 21mm socket and 3/8" drive ratchet.

Step 2: Locate the caliper and remove the caliper bolts

• Turn the steering slightly if needed for access.
• Remove the two caliper slide pin bolts using a 14mm socket and 3/8" drive ratchet.
• Carefully lift the caliper off the rotor.
• Hang the caliper using a wire hook or bungee cord so it doesn’t pull on the brake hose.

Step 3: Remove the old pads and hardware

• Slide the old brake pads out by hand. If stuck, gently pry with a flathead screwdriver.
• Remove the stainless hardware clips (abutment clips) from the bracket using needle-nose pliers.
• Spray the bracket pad channels with brake cleaner spray and wipe with shop towels.
• Clean metal-to-metal sliding points only.

Step 4: Remove the caliper bracket (recommended for proper cleaning)

• Remove the two caliper bracket bolts using a 17mm socket, breaker bar, and 6" extension.
• Set the bracket aside and clean the pad contact areas with brake cleaner spray and shop towels.
• Reinstall the bracket and tighten the bolts with a torque wrench: Torque to 107 Nm (79 ft-lbs).

Step 5: Compress the caliper piston

• Before compressing, check the brake fluid reservoir under the hood—make sure it won’t overflow.
• Place an old pad against the piston face, then slowly compress the piston using a C-clamp brake piston compressor.
• Compress until the piston is fully seated and there’s room for the thicker new pads.
• Go slow to avoid damaging seals.

Step 6: Install new hardware clips and new pads

• Install the new abutment clips onto the bracket by hand (use needle-nose pliers if needed).
• Apply a thin film of brake caliper slide pin grease (silicone brake grease) to the pad “ears” where they slide in the clips (not on the pad friction material).
• Install the new pads into the bracket. Ensure the wear indicator (small metal “squealer” clip) matches the same position as the original pads.

Step 7: Service the slide pins and reinstall the caliper

• Pull the slide pins out of the caliper bracket by hand, wipe clean with shop towels, and apply a light coat of brake caliper slide pin grease (silicone brake grease).
• Reinstall the slide pins and make sure they move smoothly.
• Set the caliper back over the new pads.
• Install the caliper slide pin bolts using a 14mm socket and 3/8" drive ratchet, then tighten with a torque wrench: Torque to 34 Nm (25 ft-lbs).

Step 8: Reinstall wheels and torque lug nuts

• Reinstall the wheels using a 21mm socket.
• Lower the van off the jack stands using the floor jack.
• Tighten lug nuts in a star pattern with a torque wrench: Torque to 103 Nm (76 ft-lbs).

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✅ After Repair

• With the engine off, pump the brake pedal 10–15 times until it feels firm (this seats the pistons).
• Check the brake fluid reservoir level and top off with DOT 3 only if needed.
• Start the van and do a slow test in a safe area. Confirm normal pedal feel and no pulling or grinding.
• Pad break-in (recommended): do 6–10 smooth stops from ~50 km/h to ~15 km/h, with cooling time between stops.

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💰 DIY vs Shop Cost

Shop Cost: ₹6,000-₹12,000 (parts + labor)

DIY Cost: ₹2,500-₹6,500 (parts only)

You Save: ₹3,500-₹5,500 by doing it yourself!

Shop labor rates vary but typically run ₹800-₹1,500/hour. This repair takes a shop approximately 1.0-1.8 hours.

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🎯 Ready to get started?

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