why do my brakes feel spongy in my Toyota Corolla E140 (2006-2013)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the parking brake is engaged.
• Wear safety goggles and gloves.

2. Check and Refill Brake Fluid

• If the brake fluid level is low, remove the master cylinder cap.
• Add the appropriate brake fluid (DOT 3 or DOT 4 as specified in the owner's manual) to the correct level.
• Replace the cap securely.

3. Inspect and Repair Brake Lines

• If leaks are detected, use a wrench to tighten any loose fittings.
• If lines are damaged, replace the affected brake line with a new one.
• Ensure all connections are leak-free after tightening.

4. Bleed Brake Lines

• Start with the brake furthest from the master cylinder (right rear, left rear, right front, left front).
• Attach a clear hose to the bleeder valve on the brake caliper and place the other end in a container.
• Have an assistant pump the brake pedal several times and hold it down.
• Open the bleeder valve to release fluid and any trapped air, then close it before the pedal is released.
• Repeat until no air bubbles appear in the fluid. Check fluid levels and refill if needed.

5. Inspect and Replace Master Cylinder (if necessary)

• If the master cylinder is leaking or malfunctioning, remove it by disconnecting brake lines and unbolting it from the brake booster.
• Install a new master cylinder, ensuring all connections are tightened and secure.
• Bleed the brake system again after installation.