how to fix my Toyota Corolla E170 (2013-2019) if the brakes feel spongy

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

551 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 spongy brakes on your Toyota Corolla E170 (2013-2019). 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 wear safety glasses and gloves when working with brake fluid.
•Ensure the vehicle is securely lifted and supported before working underneath.

Symptoms

•Spongy brake pedal feel
•Increased stopping distance
•Brake warning light illuminated
•Reduced braking effectiveness
•Unusual noises when braking

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible leaks in brake lines, calipers, and wheel cylinders.
3
Inspect brake pads and rotors for wear or damage.
4
Use an OBD-II scanner to check for any related error codes.
5
Perform a brake line bleed to remove any trapped air.
6
Test the brake booster for proper operation.

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

•Brake fluid
•Socket set
•Wrench set
•Brake bleeder kit
•Vacuum pump

Parts Required

•Brake fluid
•Brake hoses
•Brake pads
•Brake rotors

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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, calipers, and wheel cylinders.
3
Inspect brake pads and rotors for wear or damage.
4
Use an OBD-II scanner to check for any related error codes.
5
Perform a brake line bleed to remove any trapped air.
6
Test the brake booster for proper operation.

Solution

1. Preparation

Gather tools: brake fluid, socket set, wrench set, brake bleeder kit, and a vacuum pump.
Ensure the vehicle is parked on a level surface and the ignition is off.
Wear safety glasses and gloves, and ensure the car’s parking brake is engaged.

2. Inspect Brake Fluid

Open the hood and locate the brake master cylinder.
Check the fluid level; if low, fill with the manufacturer-recommended brake fluid (usually DOT 3 or DOT 4).
Inspect the fluid for contamination (dark color or debris).

3. Check for Leaks

Visually inspect all brake lines, calipers, and wheel cylinders for signs of leaking fluid.
If any leaks are found, replace the damaged hoses or components.

4. Bleed Brake Lines

Start with the wheel farthest from the master cylinder (usually the passenger rear).
- Attach the brake bleeder kit to the bleeder valve on the brake caliper.
- Have an assistant pump the brake pedal several times, then hold it down.
- Open the bleeder valve to let air and old fluid escape; close it before your assistant releases the brake pedal.
- Repeat until clear fluid comes out without bubbles, then tighten the bleeder valve.
Move to the next wheel (driver rear, passenger front, driver front) and repeat the process.

5. Test Brake Booster

With the engine off, pump the brake pedal until it feels firm.
Start the engine while pressing the brake pedal; it should sink slightly if the booster is functioning properly.