my Skoda Octavia's brake pedal goes to the floor what's the issue

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure vehicle is parked on a level surface and secure with wheel chocks.
• Wear safety gloves and goggles.

2. Inspect and Repair Brake Lines

• Sub-steps:
  1. Raise the vehicle using a jack and secure it with jack stands.
  2. Visually inspect brake lines for cracks, corrosion, or leaks.
  3. If leaks are found, replace damaged sections of the brake line using a flare tool and appropriate fittings.

Tools Required:

• Jack and jack stands
• Wrench set
• Brake line flaring tool

3. Check and Replace the Master Cylinder

• Sub-steps:
  1. Remove the brake fluid reservoir cap and inspect for contamination.
  2. Disconnect the brake lines from the master cylinder.
  3. Unbolt the master cylinder from the brake booster and remove it.
  4. Install the new master cylinder in reverse order of removal, making sure to torque bolts to manufacturer specifications (typically around 15-20 Nm).
  5. Reconnect the brake lines and refill the reservoir with fresh brake fluid.

Parts Required:

• New master cylinder
• Brake fluid (DOT 4 or as specified)

4. Bleed the Brake System

• Sub-steps:
  1. Start at the furthest brake from the master cylinder and work toward the closest.
  2. Use a brake bleeder kit or have an assistant pump the brake pedal while you open and close the bleeder valve.
  3. Repeat until no air bubbles are present in the fluid.

Tools Required:

• Brake bleeder kit
• Wrench for bleeder valves