why does my Ford Explorer Fifth Generation (2011-2019) brake pedal feel spongy when pressed

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

550 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 a spongy brake pedal in Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always allow the vehicle to cool before working on the brakes.
•Ensure the vehicle is securely lifted and supported before removing wheels.

Symptoms

•Spongy or soft brake pedal feel
•Increased stopping distance
•Brake warning light illuminated on the dashboard
•Unresponsive brakes when pressed firmly
•Fluid leak near the wheels or under the vehicle

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible leaks in brake lines or around calipers.
3
Scan for error codes using an OBD-II scanner to check for any brake system faults.
4
Test the brake booster for proper function and vacuum.
5
Inspect brake pads and rotors for wear and proper installation.
6
Perform a brake fluid quality test to check for moisture or contamination.

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

•OBD-II scanner
•Brake fluid extractor
•Wrenches and socket set
•Brake bleeder kit
•Torque wrench

Parts Required

•Brake fluid (DOT 3 or DOT 4)
•Brake pads (if worn)
•Brake rotors (if damaged)

Related Faults

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Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible leaks in brake lines or around calipers.
3
Scan for error codes using an OBD-II scanner to check for any brake system faults.
4
Test the brake booster for proper function and vacuum.
5
Inspect brake pads and rotors for wear and proper installation.
6
Perform a brake fluid quality test to check for moisture or contamination.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is on a flat surface and secure it with wheel chocks.
Disconnect the negative battery terminal.

2. Inspect and Replace Brake Fluid

Sub-steps:
- Remove the master cylinder cap and check fluid condition; if contaminated or dark, it needs replacement.
- Use a brake fluid extractor to remove old fluid from the reservoir.
- Refill with the manufacturer's recommended brake fluid (usually DOT 3 or DOT 4).
- Replace the master cylinder cap securely.

3. Bleed the Brakes

Sub-steps:
- Begin at the wheel farthest from the master cylinder (right rear).
- Attach a clear tube to the bleeder valve on the brake caliper and place the other end in a container to catch fluid.
- Have an assistant press the brake pedal while you open the bleeder valve to release air and old fluid; close the valve before the pedal is released.
- Repeat this process for each wheel in the following order: right rear, left rear, right front, left front.
- Monitor fluid level in the master cylinder and top off as necessary during bleeding.

4. Inspect Brake Components

Sub-steps:
- Remove the wheel to access the brake assembly.
- Check brake pads for wear; replace if less than 3mm thick.
- Inspect rotors for warping or scoring; replace if necessary.
- Ensure calipers are functioning and not seized.

5. Reassemble and Finalize

Sub-steps:
- Reinstall the wheels and torque to manufacturer specifications.
- Reconnect the negative battery terminal.
- Test the brake pedal feel before driving.