why is my Honda Civic's brake pedal spongy

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and secure it with wheel chocks.
• Disconnect the battery to prevent any electrical issues.

2. Check and Replace Brake Fluid

• Tools Required: Brake fluid, funnel, clean rags.
• Ensure that the brake fluid is at the correct level and of the proper type (usually DOT 3 or DOT 4).
• If low, top off the fluid in the master cylinder reservoir.

3. Bleed the Brake System

• Tools Required: Brake bleeder kit or clear tubing, catch container, wrench.
• Connect the clear tubing to the bleeder valve on the brake caliper.
• Have an assistant press the brake pedal several times and hold it down.
• Open the bleeder valve to allow fluid and air to escape, then close it before the pedal is released.
• Repeat this process until clear, bubble-free fluid flows from the bleeder valve.
• Check and refill the master cylinder reservoir as necessary during the process.

4. Inspect and Replace Brake Components

• Tools Required: Socket set, torque wrench, brake cleaner, replacement brake pads/rotors if necessary.
• Remove the wheel to access the brake components.
• Inspect brake pads for thickness and rotors for scoring or warping.
• Replace any worn or damaged components as needed, following manufacturer specifications for torque values.

5. Test Brake Booster

• Tools Required: Vacuum gauge (if needed).
• With the engine running, press the brake pedal several times; it should feel firm.
• If the pedal sinks or feels spongy, the brake booster may need to be checked or replaced.