🔧 Sienna - Rear Brake Pad Replacement

On your Sienna, the rear brake pads sit inside the rear calipers and squeeze the rotors to slow the van. Replacing worn pads restores safe stopping power and helps prevent rotor damage and noise.

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

---

⚠️ Safety & Precautions

• 🛑 Support the van with jack stands; never rely on a floor jack alone.
• 🧱 Chock the front wheels before lifting the rear.
• 🔥 Brakes can be hot; let them cool before touching parts.
• 🧪 Avoid breathing brake dust; use brake cleaner, not compressed air.
• 🧴 Brake fluid can damage paint; keep rags handy and wipe spills fast.
• 🔧 Keep the parking brake released while servicing rear brakes.
• 🔋 Battery disconnect is not required for this job.

---

🔧 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
• 1/2" breaker bar
• 3/8" ratchet
• 14mm socket
• 17mm socket
• Torque wrench (10-200 Nm range)
• C-clamp (6" minimum)
• Flat-blade screwdriver
• Bungee cord
• Brake cleaner
• Wire brush
• Nitrile gloves
• Safety glasses

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear brake pad set - Qty: 1
• Rear brake pad hardware kit - Qty: 1 (recommended)
• Brake caliper grease (silicone) - Qty: 1
• Brake fluid (DOT 3) - Qty: 1 bottle (only if topping off)

---

📋 Before You Begin

• Park on level ground, shift to P, and turn the engine off.
• Release the parking brake fully (on your Sienna it’s a mechanical pedal system, not an electronic parking brake).
• Loosen the rear wheel lug nuts slightly using a 21mm socket and breaker bar before lifting.
• Open the hood and locate the brake fluid reservoir; keep the cap seated loosely so fluid can move as you compress caliper pistons.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the rear

• Place wheel chocks in front of both front tires.
• Lift the rear with a floor jack (rated 3-ton minimum) and support it with jack stands (rated 3-ton minimum).
• Remove both rear wheels using a 21mm socket.

Step 2: Locate the caliper and remove the caliper bolts

• Find the rear brake caliper (the clamp that squeezes the rotor).
• Remove the two caliper slide pin bolts using a 14mm socket and 3/8" ratchet.
• Lift the caliper off the bracket and hang it with a bungee cord so the brake hose is not stretched.
• Never let the caliper dangle by the hose.

Step 3: Remove the old pads and hardware

• Slide the old inner and outer pads out of the caliper bracket by hand; use a flat-blade screwdriver gently if they’re stuck.
• If you’re replacing hardware, remove the pad clips from the bracket.
• Clean the bracket pad “rails” with brake cleaner and a wire brush (these are the metal ledges the pads slide on).

Step 4: Compress the caliper piston

• The piston is the round part that pushes the pad; it must be pushed back to fit thicker new pads.
• Place an old pad against the piston face, then use a C-clamp (6" minimum) to slowly compress the piston fully into the caliper.
• Check the brake fluid reservoir while compressing; if it rises near the top, remove a small amount (do not overflow).

Step 5: Install new hardware and pads

• Install new pad clips (hardware) onto the bracket by hand.
• Apply a thin film of brake caliper grease (silicone) where the pad backing plates contact the clips.
• Slide the new pads into the bracket. Make sure they move freely.
• Grease goes on metal-to-metal contact points only.

Step 6: Reinstall the caliper

• Set the caliper back over the new pads.
• Install the slide pin bolts using a 14mm socket, then Torque to 25 Nm (19 ft-lbs).
• If you removed the caliper bracket (not always necessary), reinstall the bracket bolts using a 17mm socket and Torque to 79 Nm (58 ft-lbs).

Step 7: Reinstall wheels

• Reinstall both rear wheels and hand-thread the lug nuts.
• 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).

---

✅ After Repair

• With the engine off, pump the brake pedal 10–15 times until it feels firm (this seats the pistons against the new pads).
• Check brake fluid level and top off with DOT 3 only if needed.
• Test at low speed in a safe area; confirm no pulling, grinding, or warning lights.
• Pad bedding (recommended): do 6–8 moderate stops from ~40 mph down to ~10 mph, allowing short cool-down between stops.

---

💰 DIY vs Shop Cost

Shop Cost: $300-$550 (parts + labor)

DIY Cost: $70-$180 (parts only)

You Save: $130-$480 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.5 hours.

---

🎯 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.