my Skoda Octavia's brake pedal feels spongy what should I check

Solution

1. Preparation

• Gather tools: brake fluid, socket set, wrench set, vacuum pump (if necessary), and safety goggles.
• Ensure the vehicle is parked on a level surface and secure it with wheel chocks.

2. Check and Refill Brake Fluid

• Sub-steps:
  • Open the hood and locate the brake fluid reservoir.
  • Inspect the fluid level; if low, top it off with the recommended brake fluid type (DOT 4 is common).
  • Check for any signs of contamination (milky appearance) and replace fluid if necessary.

3. Inspect Brake Lines and Components

• Sub-steps:
  • Visually inspect all brake lines for cracks, corrosion, or leaks.
  • If leaks are found, replace the damaged brake line.
  • Check the master cylinder for leaks and ensure it is functioning properly. If damaged, replace it.

4. Bleed Brake System

• Sub-steps:
  • Attach a clear tube to the bleeder valve on each brake caliper.
  • Have an assistant pump the brake pedal several times and hold it down.
  • Open the bleeder valve to allow air and old fluid to escape, then close it before your assistant releases the pedal.
  • Repeat this process until clear brake fluid without air bubbles is coming out.
  • Start with the wheel farthest from the master cylinder and work your way to the nearest.

5. Inspect and Replace Brake Pads if Necessary

• Sub-steps:
  • Remove the wheel to access the brake assembly.
  • Inspect the brake pads for wear; replace if they are thinner than the manufacturer’s specified minimum thickness.
  • Replace brake rotors if they are worn beyond specifications or if they show signs of warping.

6. Test Brake System

• Sub-steps:
  • Reassemble any removed components and wheels.
  • Start the vehicle and press the brake pedal to ensure it feels firm.
  • Perform a short test drive to confirm that braking is effective and there are no abnormal noises.