my Ford Explorer has a spongy brake pedal, what should I check?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

560 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. 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

•Ensure the vehicle is securely supported before working on the brakes.
•Disconnect the battery when working on electrical components or the brake booster.

Symptoms

•Spongy brake pedal feel when pressed
•Longer stopping distance
•Brake warning light illuminated on the dashboard
•Brake fluid leaking under the vehicle
•Increased pedal travel before brakes engage

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible leaks in the brake lines or around the calipers.
3
Examine the condition of the brake pads and rotors for wear or damage.
4
Inspect the brake booster for proper function and vacuum leaks.
5
Check for air in the brake lines by performing a brake pedal pump test.
6
Test the brake master cylinder for internal leaks.

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

•Socket set
•Brake bleeder kit
•Vacuum gauge
•Torque wrench
•Plastic hose

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 the brake lines or around the calipers.
3
Examine the condition of the brake pads and rotors for wear or damage.
4
Inspect the brake booster for proper function and vacuum leaks.
5
Check for air in the brake lines by performing a brake pedal pump test.
6
Test the brake master cylinder for internal leaks.

Solution

1. Preparation

Gather required tools and parts.
Ensure the vehicle is on a flat surface and secure with wheel chocks.
Wear safety glasses and gloves.

2. Check and Refill Brake Fluid

Open the hood and locate the brake fluid reservoir.
If the fluid is low, add the appropriate type of brake fluid (DOT 3 or DOT 4, as specified in the owner's manual).
Inspect for leaks around the reservoir cap and lines.

3. Bleed the Brake System

Attach a clear plastic hose to the brake bleeder valve on the farthest brake caliper from the master cylinder.
Have an assistant pump the brake pedal several times and hold it down.
Open the bleeder valve to let fluid escape, then close it before the pedal is released.
Repeat this process until no air bubbles are visible in the fluid.
Move to the next caliper and repeat until all calipers have been bled.

4. Inspect and Replace Brake Components (if necessary)

Remove the wheel to access the brake assembly.
Inspect the brake pads for wear; replace them if they are less than 3mm thick.
Check the rotors for scoring or warping; replace if necessary.
If the brake pads or rotors were replaced, perform a proper bedding procedure.

5. Check the Brake Booster (if the problem persists)

Locate the brake booster.
Inspect the vacuum line for cracks or disconnections.
Use a vacuum gauge to test the booster for proper operation.
Replace the brake booster if it is faulty.