Skoda Octavia NFL (2020-Present) brake pedal goes to the floor, what's wrong?

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Ensure the engine is off and the vehicle is cool.

2. Check Brake Fluid Level

• Open the hood and locate the brake master cylinder.
• Remove the cap and check the fluid level; top up with the appropriate brake fluid if low (DOT 4 or as specified).
• Inspect for any signs of contamination in the fluid.

3. Inspect for Leaks

• Visually inspect all brake lines, hoses, and connections for leaks or damage.
• If any leaks are found, replace the affected components.
• Clean any spilled brake fluid with soap and water, as it can damage paint.

4. Replace Master Cylinder (if defective)

• Disconnect the negative battery terminal to avoid electrical issues.
• Remove the brake lines from the master cylinder using the appropriate wrench.
• Unbolt the master cylinder from the brake booster and remove it.
• Install the new master cylinder, ensuring proper torque specifications (typically around 15-20 Nm).
• Reattach the brake lines and check for tightness.

5. Bleed the Brake System

• Reconnect the negative battery terminal.
• Start bleeding the brake system using the two-person method or a vacuum bleeder.
• Begin with the wheel furthest from the master cylinder (usually the right rear) and work towards the closest (left front).
• Ensure no air bubbles are present in the fluid before closing the bleeder screws.

6. Test Brake Operation

• Pump the brake pedal several times to establish pressure.
• Perform a brake test at low speed in a safe area to ensure proper functioning.