why does my Skoda Octavia's brake pedal feel spongy

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Wear safety goggles and gloves for protection.

2. Check Brake Fluid Level

• Open the hood and locate the brake fluid reservoir.
• Inspect the fluid level; if low, top it off with the manufacturer-recommended brake fluid (DOT 4 or as specified).
• Check for leaks after adding fluid.

3. Inspect and Repair Leaks

• Visually inspect all brake lines, hoses, and connections for any signs of leaks.
• If a leak is found, replace the damaged component (e.g., brake line, caliper, or master cylinder).
• Use a line wrench to disconnect and replace brake lines if necessary.

4. Bleed the Brake System

• Start with the wheel farthest from the master cylinder (usually rear passenger side).
• Attach a clear hose to the bleeder valve on the brake caliper and submerge the other end in a container with brake fluid.
• Have an assistant pump the brake pedal several times, then hold down the pedal.
• Open the bleeder valve to release air and fluid, then close it before the pedal is released.
• Repeat this process until no air bubbles are visible, then move to the next wheel (rear driver side, front passenger side, front driver side).
• Ensure to maintain fluid levels in the reservoir throughout the bleeding process.

5. Inspect Brake Booster

• Check the brake booster for vacuum leaks or damage.
• With the engine off, pump the brake pedal several times; it should feel firm.
• Start the engine while pressing the brake pedal; it should drop slightly, indicating proper booster function.
• If the pedal does not drop or feels firm, consider replacing the brake booster.