why does my Skoda Octavia's brake pedal feel spongy

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is on a flat surface, and engage the parking brake.
• Wear safety gloves and goggles.

2. Brake Fluid Inspection and Replacement

• Sub-steps:
  1. Check Fluid Level: Open the hood and locate the brake master cylinder reservoir. Ensure the fluid level is between the minimum and maximum marks.
  2. Top Up Fluid: If low, add the recommended brake fluid (DOT 4) to the reservoir.
  3. Inspect for Contamination: If the fluid is dark or contaminated, proceed to replace it.
• Tools Required: Brake fluid, funnel, clean rag.

3. Bleed the Brake System

• Sub-steps:
  1. Locate Brake Bleed Valves: Start with the brake farthest from the master cylinder (usually the right rear).
  2. Attach Hose: Connect a clear hose to the bleed valve and place the other end in a container.
  3. Pump Brake Pedal: Have an assistant pump the brake pedal several times and hold it down.
  4. Open Bleed Valve: While the pedal is held down, open the bleed valve to let air and fluid escape.
  5. Close Bleed Valve: Close the valve before the assistant releases the pedal. Repeat until no air bubbles are visible.
  6. Repeat for Other Brakes: Continue the process on the left rear, right front, and finally left front.
• Tools Required: Brake bleeder kit or clear tubing, wrench for bleed valves.

4. Inspect and Replace Components (if needed)

• Sub-steps:
  1. Visual Inspection: Check brake lines, calipers, and hoses for any signs of damage or corrosion.
  2. Check Brake Pads and Rotors: Measure thickness and check for uneven wear. Replace if necessary.
  3. Inspect Brake Booster: Test for vacuum leaks by pinching the vacuum line and checking pedal firmness.
• Parts Required: Brake pads, rotors, brake lines (if damaged).