Volkswagen Passat B8 (2015-2022) brake pedal goes to the floor why

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat surface and securely lifted using jack stands.
• Wear safety gloves and goggles.

2. Inspect and Replace Brake Fluid

• Sub-steps:
  1. Open the master cylinder reservoir cap.
  2. If the fluid is low, top it off using the recommended brake fluid type (DOT 4 for most VW models).
  3. If fluid is contaminated or has a dark color, proceed to flush the system.

Tools Required:

• Brake fluid
• Funnel

3. Inspect and Repair Brake Lines

• Sub-steps:
  1. Examine all brake lines and hoses for cracks, corrosion, or leaks.
  2. If leaks are found, replace the damaged brake line or hose.
  3. Bleed the brake system after replacing any components to remove air from the lines.

Tools Required:

• Wrench set
• Brake line cutter (if necessary)
• Brake bleeder kit

4. Replace Brake Components (if necessary)

• Sub-steps:
  1. Remove the wheel to access brake components.
  2. Inspect brake pads and rotors; replace if worn beyond specifications.
  3. Reassemble all components and ensure everything is torqued to manufacturer specifications.

Tools Required:

• Socket set
• Torque wrench
• Brake pad spreader

5. Bleed the Brake System

• Sub-steps:
  1. Attach a brake bleeder kit to the brake bleeder valve on the farthest brake caliper from the master cylinder.
  2. Open the valve and have an assistant pump the brake pedal until fluid flows without bubbles.
  3. Repeat for each caliper in the order prescribed by the manufacturer.
  4. Check fluid levels and top off as necessary.

Tools Required:

• Brake bleeder kit
• Container for old brake fluid