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Why does my 2020 Toyota Highlander make a grinding noise while braking? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/Why does my 2020 Toyota Highlander make a grinding noise while braking?

Why does my 2020 Toyota Highlander make a grinding noise while braking?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
599 words

Problem Statement

Learn how to diagnose and repair grinding noise issues while braking in your 2020 Toyota Highlander. Step-by-step instructions and necessary tools included.

Affected Component
braking system
Estimated Time
2-4 hours

Symptoms

  • •A grinding noise occurs when applying the brakes.
  • •The noise may intensify during hard braking or when coming to a stop.
  • •Potential vibration felt through the brake pedal.
  • •Warning light on the dashboard related to brakes (if applicable).

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •Jack
  • •Jack stands
  • •Wheel chocks
  • •Lug wrench
  • •Caliper tool
  • •Flashlight
  • •Caliper gauge
  • •C-clamp or brake caliper tool
  • •Lubricant (brake grease)
  • •Cleaning brush
  • •Socket set
  • •Torque wrench
  • •Rotor resurfacing tool or new rotors

Additional Information

Affected Component
braking system
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
13 items

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Back to Generation
Problem Diagnosis: Grinding Noise While Braking in 2020 Toyota Highlander
Possible Causes
  1. Worn brake pads.
  2. Contaminated brake pads or rotors (dirt, debris, or moisture).
  3. Damaged or worn brake rotors.
  4. Brake caliper issues.
  5. Insufficient brake lubrication.

Step 1: Visual Inspection

  • Tools Required: Jack, jack stands, wheel chocks, lug wrench.
  • Procedure:
    1. Park the vehicle on a level surface and engage the parking brake.
    2. Place wheel chocks behind the rear wheels.
    3. Using a lug wrench, loosen the lug nuts on the front wheels.
    4. Lift the vehicle using a jack and secure it with jack stands.
    5. Remove the front wheels for access to the brakes.

Step 2: Inspect Brake Pads

  • Tools Required: Caliper tool, flashlight.
  • Procedure:
    1. Examine the brake pads for thickness. Pads should be at least 3 mm thick.
    2. Look for uneven wear patterns or signs of cracking.
    3. Check for any debris stuck between the pad and rotor.

Step 3: Inspect Brake Rotors

  • Tools Required: Caliper gauge, flashlight.
  • Procedure:
    1. Check rotors for scoring, grooves, or warping.
    2. Measure rotor thickness with a caliper gauge; it should meet manufacturer specifications.
    3. Check for rust or corrosion that might cause noise.

Step 4: Inspect Brake Calipers

  • Tools Required: C-clamp or brake caliper tool.
  • Procedure:
    1. Ensure the caliper moves freely. Manually compress the caliper piston if necessary.
    2. Look for signs of leakage from the caliper seals.
    3. Check the caliper mounting bolts for tightness.

Step 5: Inspect Brake Hardware

  • Tools Required: Lubricant (brake grease), cleaning brush.
  • Procedure:
    1. Inspect the anti-rattle clips and shims for damage or wear.
    2. Clean the caliper slides and apply brake grease to ensure smooth operation.
Repair Instructions

Step 1: Replace Worn Brake Pads

  • Tools Required: New brake pads, socket set, torque wrench, brake grease.
  • Procedure:
    1. Remove the caliper bolts and lift the caliper off the rotor.
    2. Remove old pads from caliper brackets.
    3. Install new brake pads, ensuring the correct orientation.
    4. Use a C-clamp to compress the caliper piston back into its housing.
    5. Reattach the caliper and torque the bolts to manufacturer specifications.

Step 2: Resurface or Replace Rotors

  • Tools Required: Rotor resurfacing tool or new rotors.
  • Procedure:
    1. If rotors are within specification, have them resurfaced at a machine shop.
    2. If rotors are worn beyond specification, replace with new rotors.
    3. Install the new or resurfaced rotors, ensuring they are clean and free of oil.

Step 3: Reassemble Brake Components

  • Tools Required: Torque wrench.
  • Procedure:
    1. Reinstall any anti-rattle clips and hardware.
    2. Ensure all components are secured and torqued to specifications.
    3. Reinstall the wheel and lug nuts. Torque lug nuts to manufacturer specifications.

Step 4: Test the Braking System

  • Procedure:
    1. Lower the vehicle and remove wheel chocks.
    2. Press the brake pedal several times to seat the pads against the rotors.
    3. Test drive the vehicle to ensure the grinding noise is resolved.
Final Check
  • After repairs, monitor for any unusual noises or brake performance issues.
  • Schedule a follow-up inspection if the grinding noise persists or if any warning lights remain illuminated.