🔧 RX350 - Front Brake Pad Replacement

Replacing the front brake pads restores braking power and prevents rotor damage when pads get thin. On your RX350, the front caliper is removed from the bracket, the piston is pushed back, and new pads (with shims) are installed.

Difficulty Level: Intermediate | Estimated Time: 1.5-3 hours

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⚠️ Safety & Precautions

• ⚠️ Support the RX350 on jack stands; never rely on a floor jack alone.
• ⚠️ Brake dust is irritating—wear safety glasses and a dust mask; don’t blow dust with compressed air.
• ⚠️ Keep fingers clear when compressing the caliper piston; it can move suddenly.
• ⚠️ Check the brake fluid level before compressing pistons—fluid can overflow the reservoir.
• ⚠️ No battery disconnect is required for front pads, but keep ignition OFF while working.

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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 (1/2")
• Torque wrench (20–150 ft-lbs range)
• 14mm socket
• 17mm socket
• Ratchet (3/8" or 1/2")
• C-clamp (6")
• Brake caliper hanger (specialty)
• Flathead screwdriver
• Wire brush
• Brake cleaner spray
• Nitrile gloves
• Safety glasses
• Dust mask

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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/shim kit - Qty: 1
• Brake grease (silicone or synthetic) - 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.
• Place wheel chocks behind the rear tires.
• Pop the hood and locate the brake fluid reservoir. If it’s near “MAX,” remove a little fluid with a clean syringe/turkey baster before compressing pistons.
• Loosen (crack loose) the front lug nuts about 1/2 turn using a 21mm socket and breaker bar before lifting.
• Caliper hanger = hook that supports the caliper.
• C-clamp = tool that slowly presses the piston 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 at the proper jacking point using a floor jack (rated 3-ton minimum).
• Set the RX350 onto jack stands (rated 3-ton minimum) and gently shake the vehicle to confirm it’s stable.

Step 2: Remove the front wheels

• Remove the lug nuts using a 21mm socket and ratchet.
• Remove both front wheels and set them aside.

Step 3: Remove the front caliper (leave the bracket on for now)

• Turn the steering wheel for better access (left to work on right side, right to work on left side).
• Locate the two caliper slide pin bolts on the back of the caliper and remove them using a 14mm socket and ratchet.
• Lift the caliper off the bracket.
• Hang the caliper from the suspension spring using a brake caliper hanger (specialty) so the brake hose is not stretched.
• Never let the caliper hang by the hose.

Step 4: Remove old pads, shims, and hardware

• Slide the old pads out of the bracket by hand. Use a flathead screwdriver gently if they’re stuck.
• Remove the pad shims/hardware clips (note how they sit). If you’re installing a new hardware kit, discard the old clips.

Step 5: Clean the bracket and pad contact points

• Spray the bracket pad tracks with brake cleaner spray.
• Lightly clean rust buildup where the hardware clips sit using a wire brush.
• Wipe dry and make sure the new clips sit flat.

Step 6: Compress the caliper piston

• Place one old pad against the piston face (to spread force evenly).
• Slowly compress the piston using a C-clamp (6") until it bottoms out.
• Check the brake fluid reservoir while compressing; remove excess if it rises too high.
• Go slow to avoid damaging seals.

Step 7: Install new hardware/shims and grease (correct places only)

• Install the new hardware clips onto the bracket by hand.
• Apply a thin layer of brake grease (silicone or synthetic) to the pad “ears” (the metal tabs that slide in the clips).
• Do NOT get grease on pad friction material or the rotor surface.

Step 8: Install the new pads

• Install the inner and outer pads into the bracket by hand.
• Make sure they slide freely in the clips (they should not bind).

Step 9: Reinstall the caliper and torque bolts

• Lower the caliper over the new pads.
• Install the two slide pin bolts by hand first, then tighten using a 14mm socket and ratchet.
• Tighten with a torque wrench: Torque to 34 Nm (25 ft-lbs).
• If you removed the caliper bracket (not required for pads-only), the bracket bolts tighten with a 17mm socket: Torque to 123 Nm (91 ft-lbs).

Step 10: Reinstall wheels and torque lug nuts

• Reinstall the wheels and hand-thread lug nuts.
• Lower the RX350 to the ground using a floor jack (rated 3-ton minimum).
• Tighten lug nuts in a star pattern using 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 pads against the rotors).
• Check brake fluid level and top off with DOT 3 if needed.
• Start the engine and confirm the pedal feel is normal (it will drop slightly with brake booster assist).
• Test drive slowly in a safe area; confirm no pulling, grinding, or warning lights.
• Bed-in procedure: make 6–8 moderate stops from ~40 to 10 mph, with 30–60 seconds between stops to cool slightly. Avoid hard stops for the first 200 miles.

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💰 DIY vs Shop Cost

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

DIY Cost: $60-$160 (parts only)

You Save: $190-$540 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-1.5 hours.

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🎯 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.