🔧 Sonata - Front Brake Pads & Rotors Replacement

You’ll remove the front calipers, swap the pads and rotors, then reassemble and torque everything correctly. This restores stopping power and helps prevent vibration (warped rotors) and squealing (worn pads/hardware).

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

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⚠️ Safety & Precautions

• ⚠️ Support your Sonata on jack stands; never rely on a jack.
• ⚠️ Brake dust is harmful—avoid blowing it out; use brake cleaner.
• ⚠️ Keep the key fob away and make sure the car is fully OFF (not in READY).
• ⚠️ Do not let the caliper hang by the brake hose—support it with a hook/strap.
• ⚠️ Battery disconnect is not required for front brakes.

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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 (10–150 ft-lbs)
• 14mm socket
• 17mm socket
• Ratchet (3/8" or 1/2")
• Flat trim/pry tool
• Phillips #3 screwdriver
• Brake caliper piston compression tool (specialty)
• Bungee cord or caliper hook
• Wire brush
• Brake cleaner spray
• Safety glasses
• Nitrile gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front brake pad set - Qty: 1
• Front brake rotors - Replace in pairs - Qty: 2
• Front pad hardware kit (abutment clips) - Qty: 1
• Brake caliper grease (silicone) - Qty: 1
• Brake parts cleaner - Qty: 1
• DOT 3 brake fluid - Qty: 1 (small bottle for top-off)

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📋 Before You Begin

• Park on level ground, set the parking brake, and place wheel chocks behind the rear wheels.
• Confirm the car is fully OFF and the dash does not show READY.
• Open the hood and check the brake fluid level; it may rise when you compress the caliper pistons.
• If the reservoir is very full, remove a small amount with a clean syringe/turkey baster before compressing pistons.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the front wheels

• Use a 21mm socket with a breaker bar (1/2") to loosen the lug nuts 1/2 turn while on the ground.

Step 2: Lift and secure the front end

• Use a floor jack (rated 3-ton minimum) to lift the front of the car at the proper front jacking point.
• Set the car down onto jack stands (rated 3-ton minimum).
• Give the car a gentle push to confirm it’s stable before you work.

Step 3: Remove the wheels

• Use a 21mm socket and ratchet to remove the lug nuts, then remove both front wheels.

Step 4: Remove the caliper (the clamp that squeezes the pads)

• Turn the steering wheel for more access (left for right side, right for left side).
• Use a 14mm socket and ratchet to remove the two caliper slide bolts.
• Lift the caliper off and support it with a bungee cord or caliper hook.
• Torque to 25 Nm (18 ft-lbs) when reinstalling these slide bolts.

Step 5: Remove the old pads and hardware

• Pull the pads out of the bracket by hand; if stuck, use a flat trim/pry tool gently.
• Remove the stainless pad clips (abutment clips) from the bracket.
• Use brake cleaner spray and a wire brush to clean the bracket pad “tracks” where the clips sit.
• Clean metal helps pads slide quietly.

Step 6: Remove the caliper bracket

• Use a 17mm socket and breaker bar (1/2") to remove the two caliper bracket bolts.
• Remove the bracket and set it aside.
• Torque to 88 Nm (65 ft-lbs) when reinstalling these bracket bolts.

Step 7: Remove the rotor

• If your rotor has a retaining screw, remove it with a Phillips #3 screwdriver.
• Pull the rotor straight off. If stuck by rust, tap the rotor hat lightly (not the studs) while pulling.
• Clean the hub face with a wire brush and spray with brake cleaner spray.

Step 8: Install the new rotor

• Spray both sides of the new rotor with brake cleaner spray to remove packaging oil.
• Install the rotor onto the hub.
• If equipped, reinstall the retaining screw with a Phillips #3 screwdriver and snug it (it’s only to hold the rotor during assembly).

Step 9: Reinstall the bracket and new hardware clips

• Reinstall the caliper bracket and tighten bolts with a 17mm socket and torque wrench.
• Torque to 88 Nm (65 ft-lbs)
• Install the new abutment clips into the bracket.
• Apply a very thin film of brake caliper grease (silicone) where the pad ears touch the clips (do not get grease on the pad/rotor faces).

Step 10: Compress the caliper piston

• Remove the brake fluid reservoir cap under the hood (leave it sitting on top to keep dirt out).
• Use a brake caliper piston compression tool (specialty) to slowly push the piston straight back into the caliper.
• Watch the reservoir level so it does not overflow.
• Slow compression helps protect seals.

Step 11: Install new pads and reinstall the caliper

• Install the new pads into the bracket.
• Set the caliper over the new pads.
• Install the caliper slide bolts using a 14mm socket, then finish with a torque wrench.
• Torque to 25 Nm (18 ft-lbs)

Step 12: Repeat on the other front side

• Repeat Steps 4–11 on the other front wheel.

Step 13: Reinstall wheels and torque lug nuts

• Reinstall the wheels and hand-thread all lug nuts.
• Lower the car off the jack stands using the floor jack (rated 3-ton minimum).
• Use a torque wrench (10–150 ft-lbs) with a 21mm socket to torque lug nuts in a star pattern.
• Torque to 90 Nm (66 ft-lbs)

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✅ After Repair

• With the car still OFF, press the brake pedal 10–15 times until it feels firm (this seats the pistons against the pads).
• Check the brake fluid level and top off with DOT 3 brake fluid if needed.
• Do a slow test in a safe area: verify normal stopping, no pulling, and no grinding noises.
• Pad/rotor break-in: make 8–10 moderate stops from 40 mph down to 10 mph, then drive to cool the brakes.
• Tip: Use “N” during bedding to reduce regen.

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💰 DIY vs Shop Cost

Shop Cost: $450-$850 (parts + labor)

DIY Cost: $180-$420 (parts only)

You Save: $270-$430 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.

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🎯 Ready to get started?

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