my Toyota Highlander Third Generation (2014-2019) makes a grinding noise when braking, what's wrong?

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

525 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix grinding noise when braking in Toyota Highlander (2014-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always ensure the vehicle is securely lifted before working underneath.
•Disconnect the battery if working on electronic brake components.

Symptoms

•Grinding noise when applying brakes
•Vibration in the brake pedal
•Reduced braking efficiency
•Illuminated brake warning light on the dashboard
•Increased stopping distance

Diagnostic Steps

1
Inspect brake pads visually for wear and damage.
2
Check brake rotors for scoring or warping.
3
Examine brake calipers for proper operation and any signs of leakage.
4
Inspect brake fluid level and condition in the reservoir.
5
Listen for noise while performing a slow-speed brake test.

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

•Lug wrench
•Jack and jack stands
•Socket set
•Torque wrench
•Brake lathe (if resurfacing)

Parts Required

•Brake pads
•Brake rotors (if damaged)
•Brake caliper grease (optional)

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Solution

1. Preparation

Gather tools required for the repair.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Wear safety goggles and gloves for protection.

2. Remove Wheel

Using a lug wrench, loosen the lug nuts of the wheel where the grinding noise originates.
Raise the vehicle using a jack and secure it with jack stands.
Fully remove the lug nuts and take off the wheel.

3. Inspect and Replace Brake Pads

Sub-steps:
- Remove the caliper bolts using a socket set.
- Carefully slide the caliper off the rotor and support it using a bungee cord (do not let it hang from the brake line).
- Remove the old brake pads and inspect the backing plates for damage.
- Install new brake pads, ensuring they are positioned correctly.
Tools Required:
- Socket set
- Torque wrench

4. Inspect and Resurface or Replace Rotors

Sub-steps:
- Check the rotor surface for grooves or damage.
- If the rotors are within specifications, they can be resurfaced; otherwise, replace them.
- If resurfacing, use a brake lathe following manufacturer specifications.
- If replacing, install new rotors by aligning them with the hub and securing them with the appropriate torque.
Tools Required:
- Brake lathe (if resurfacing)
- Torque wrench

5. Reassemble and Test

Reinstall the caliper over the new brake pads and secure it with caliper bolts.
Reattach the wheel and hand-tighten the lug nuts.
Lower the vehicle and then torque the lug nuts to the manufacturer's specifications.
Test the brake pedal for firmness before starting the vehicle.