🔧 4Runner - Front Brake Pad Replacement

Your 4Runner uses a four-piston fixed front brake caliper. The pads slide out after removing two retaining pins, so the calipers normally stay bolted in place.

Difficulty Level: Beginner | Estimated Time: 1-1.5 hours

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⚠️ Safety & Precautions

• Work on a level, solid surface and support your 4Runner with jack stands. Never rely only on a floor jack.
• Brake dust can be harmful. Do not use compressed air or inhale the dust.
• Do not press the brake pedal while the pads are removed.
• Brake fluid damages paint. Clean spills immediately with water.
• Watch the brake-fluid reservoir while compressing the pistons; remove excess fluid before it overflows.
• Never allow grease or brake cleaner to contact the pad friction material or rotor faces.
• Battery disconnection and electronic parking-brake service mode are not required for this front brake repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• 21mm deep socket
• 1/2-inch drive breaker bar
• 1/2-inch drive torque wrench rated to at least 120 ft-lbs
• 3-ton floor jack
• 3-ton jack stands
• Wheel chocks
• 4mm pin punch
• 16-ounce ball-peen hammer
• Needle-nose pliers
• Four-piston brake caliper spreader (specialty)
• Plastic brake-fluid syringe
• Nylon brake-cleaning brush
• Disposable shop towels
• Nitrile mechanic 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 set; replace both sides
• Front brake pad hardware kit - Qty: 1
• Front brake pad anti-squeal shim kit - Qty: 1
• High-temperature ceramic brake lubricant - Qty: 1
• Non-chlorinated brake cleaner - Qty: 1 can
• DOT 3 brake fluid - Qty: 1 small sealed bottle, only if needed

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📋 Before You Begin

• Park your 4Runner on level pavement, shift to Park, apply the parking brake, and switch off the ignition.
• Place wheel chocks securely behind both rear tires.
• Confirm that the replacement pads include the correct shims and wear indicators before removing the old pads.
• Open the hood and inspect the brake-fluid reservoir. If it is at the MAX line, use a plastic brake-fluid syringe to remove a small amount.
• Do not leave the reservoir open. Brake fluid absorbs moisture from the air.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the Front Wheel Nuts

• Use a 21mm deep socket and 1/2-inch drive breaker bar to loosen each front wheel nut about one-quarter turn.
• Do not remove the wheel nuts while your 4Runner is still on the ground.

Step 2: Raise and Support the Front

• Position the 3-ton floor jack beneath the center of the front suspension crossmember.
• Raise the front until both tires clear the ground.
• Place 3-ton jack stands beneath the reinforced frame rails behind the front wheels, then lower your 4Runner onto them.
• Gently push the body to verify that it is stable before working underneath or beside it.

Step 3: Remove the Front Wheels

• Use the 21mm deep socket to remove the wheel nuts.
• Lift off both front wheels and place them flat away from the work area.
• Complete one brake assembly at a time so the other side remains available as an orientation reference.

Step 4: Inspect the Brakes

• Use the non-chlorinated brake cleaner and nylon brake-cleaning brush to remove loose dust from the caliper and retaining hardware.
• Inspect the rotor for deep grooves, blue heat spots, cracks, or a heavy outer ridge. A damaged or undersized rotor must be replaced or professionally measured before installing pads.
• Inspect the caliper for brake-fluid leakage and torn piston dust boots. Stop the repair if leakage or damaged boots are found.

Step 5: Remove the Pad Retaining Hardware

• Use needle-nose pliers to remove the small retaining clips from the two brake-pad pins.
• Hold the anti-rattle spring with one gloved hand. This spring presses against the pads and may move when the pins are removed.
• Use the 4mm pin punch and 16-ounce ball-peen hammer to tap both retaining pins out of the caliper.
• Remove the anti-rattle spring and note its installed direction.
• Photograph the hardware before removal.

Step 6: Remove the Old Pads

• Use needle-nose pliers to pull the inboard and outboard pads straight out through the rear opening of the caliper.
• Keep the old pads temporarily; they can protect the pistons during compression.
• Compare wear across all four pads. Strongly uneven wear can indicate sticking or corroded caliper pistons.

Step 7: Retract the Four Caliper Pistons

• Place the old pads back against the pistons as protective plates.
• Use the four-piston brake caliper spreader to press both pads apart slowly and evenly. A caliper spreader is a screw-operated tool that pushes the pistons safely back into their bores.
• Alternate pressure as necessary so one piston does not push another piston outward.
• Check the brake-fluid reservoir frequently. Use the plastic brake-fluid syringe to remove excess fluid if it approaches the top.
• Stop if a piston binds, leaks, or will not retract with moderate pressure.

Step 8: Prepare the New Pads and Hardware

• Use brake cleaner and disposable shop towels to clean reusable retaining pins and the anti-rattle spring, or install the new hardware kit.
• Install the anti-squeal shims onto the new pads in the same arrangement as the original pads.
• Use a gloved fingertip to apply a very thin layer of high-temperature ceramic brake lubricant to the pad ears, shim contact points, and retaining-pin contact areas.
• Do not place lubricant on the rotor or friction surfaces.
• Match the wear-indicator locations to the original pad arrangement.

Step 9: Install the New Pads

• Slide the new inboard and outboard pads fully into the caliper by hand, keeping their friction surfaces facing the rotor.
• Position the anti-rattle spring exactly as it was originally installed.
• Insert the cleaned or new retaining pins through the caliper, pads, and spring.
• Use the 4mm pin punch and 16-ounce ball-peen hammer to seat the pins gently.
• Use needle-nose pliers to install the retaining clips securely in the pin holes.
• Verify that both pins are captured and the spring is centered. These pins are retained by clips and do not have a torque specification.

Step 10: Repeat on the Opposite Side

• Repeat Steps 4 through 9 on the other front brake assembly using the same listed tools.
• Confirm that the retaining pins, clips, shims, and anti-rattle spring match the completed side.

Step 11: Reinstall the Wheels

• Install each wheel and start all wheel nuts by hand to prevent cross-threading.
• Use the 21mm deep socket to snug the nuts in a crisscross pattern.
• Use the 3-ton floor jack to raise your 4Runner slightly, remove the jack stands, and lower it fully.
• Use the 21mm deep socket and 1/2-inch drive torque wrench to tighten the wheel nuts in a crisscross pattern: Torque to 113 Nm (83 ft-lbs).

Step 12: Restore Brake Pedal Pressure

• Before starting the engine, press the brake pedal slowly several times until it becomes firm.
• Do not move your 4Runner until the pedal feels firm and consistent.
• Inspect the brake-fluid reservoir and add fresh DOT 3 brake fluid only if the level is below the proper range.
• Use disposable shop towels to clean the reservoir area and install the cap securely by hand.

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✅ After Repair

• Start the engine and hold firm pressure on the brake pedal for approximately 30 seconds. The pedal should not continue sinking.
• Check both front calipers and the brake-fluid reservoir for leakage.
• Test the brakes at walking speed in a clear, safe area before driving normally.
• Follow the pad manufacturer's bedding procedure. If none is supplied, make 6-8 moderate stops from about 50 km/h to 15 km/h, allowing time between stops and avoiding full stops with the pedal held firmly.
• Drive for several minutes afterward to let the brakes cool. Avoid hard braking for the first 300-500 km unless needed for safety.
• Recheck wheel-nut torque after approximately 80-160 km: Torque to 113 Nm (83 ft-lbs).

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💰 DIY vs Shop Cost

Shop Cost: ₹12,000-₹25,000 (parts + labor)

DIY Cost: ₹6,000-₹15,000 (parts only)

You Save: ₹6,000-₹10,000 by doing it yourself!

Imported-part pricing and labor rates around Sonīpat can vary considerably. This repair takes a shop approximately 1-1.5 hours.

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