Why is my 2021 Ford Explorer making a grinding noise while braking?

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

681 words

Problem Statement

Learn how to diagnose and repair the grinding noise issue while braking on your 2021 Ford Explorer. Step-by-step guide included.

Affected Component

braking system

Estimated Time

2-4 hours

Symptoms

•A noticeable grinding noise when applying the brakes.
•The noise may vary in intensity based on speed or pressure applied to the brake pedal.
•Potential vibration felt through the brake pedal.
•Possible warning lights on the dashboard (ABS, brake system warning).

Diagnostic Steps

1
Visual Inspection
2
Listen for Noise
3
Check Brake Fluid
4
Brake Pad and Rotor Measurements

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

•Flashlight
•wheel chocks
•jack
•jack stands
•lug wrench
•brake fluid tester (optional)
•caliper gauge
•micrometer
•brake bleeder kit or clear tubing and a catch container

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Solution

Problem Diagnosis: Grinding Noise While Braking on 2021 Ford Explorer

Possible Causes:

Worn brake pads.
Contaminated brake pads or rotors (rust, debris).
Damaged rotors (warped or scored).
Brake caliper issues (sticking or malfunction).
Insufficient brake fluid or air in the brake lines.

Repair Instructions:

If Brake Pads are Worn:

Remove Old Brake Pads:
- Remove the caliper bolts using a socket wrench.
- Carefully lift the caliper off the rotor and support it (do not hang by the brake line).
- Remove the old brake pads from the caliper bracket.
Install New Brake Pads:
- Apply a thin layer of brake grease on the back of the new pads to prevent noise.
- Install the new pads into the caliper bracket.
Reinstall Caliper:
- Use a C-clamp or brake caliper tool to compress the caliper piston back into the caliper housing.
- Place the caliper back over the new pads and secure it with bolts. Torque to manufacturer specifications.
Repeat on Opposite Side (if necessary).

If Rotors are Damaged:

Remove Rotors:
- After removing the caliper and pads, remove the caliper bracket.
- Remove any retaining screws and gently pull the rotor off the hub.
Install New Rotors:
- Clean the new rotors with brake cleaner before installation to remove any protective oil.
- Slide the new rotor onto the hub and secure it with screws if applicable.
Reassemble Braking System:
- Follow steps to install new pads and calipers as detailed above.

Final Steps:

Bleed Brakes:
- Tools Required: Brake bleeder kit or clear tubing and a catch container.
- Procedure:
  - With the brake fluid reservoir open, start at the farthest wheel (usually right rear).
  - Attach the bleeder kit or tubing to the bleeder screw on the caliper.
  - Have an assistant press the brake pedal while you open the bleeder screw. Close it before the pedal reaches the floor.
  - Repeat until no air bubbles are seen, then move to the next wheel.
Test Drive:
- Carefully lower the vehicle back to the ground and secure lug nuts.
- Perform a slow test drive, applying brakes gently to ensure proper functionality and listen for any abnormal noises.
Check Brake Fluid Level:
- After the test drive, check and top off the brake fluid if necessary.

Conclusion:

If the grinding noise persists after replacing brake pads and/or rotors, further investigation into the brake calipers or other components may be required. If you are uncomfortable performing these procedures, it is advisable to consult a certified mechanic.