why does my Volkswagen Golf MK6 (2009-2014) have a hard brake pedal?

Solution

1. Preparation

• Gather tools and parts necessary for the repair.
• Park the vehicle on a level surface and engage the parking brake.
• Wear safety goggles and gloves.

2. Inspect and Replace Brake Fluid

• Sub-steps:
  1. Open the hood and locate the brake fluid reservoir.
  2. Check the brake fluid level; add new fluid if it is low, ensuring it meets VW specifications (DOT 4).
  3. Remove the old brake fluid and replace it with fresh fluid.
• Tools Required: Brake fluid, funnel, clean cloth.

3. Inspect Brake Booster

• Sub-steps:
  1. Visually inspect the brake booster and vacuum lines for any cracks or disconnections.
  2. If a vacuum leak is found, replace the damaged hose or fitting.
  3. If the brake booster is defective, remove it by disconnecting it from the master cylinder and unbolting it from the firewall.
  4. Install the new brake booster, ensuring all connections are secure.
• Tools Required: Socket set, screwdrivers.

4. Test Brake Master Cylinder

• Sub-steps:
  1. Check for leaks around the master cylinder and the brake lines.
  2. If leaks are present, replace the master cylinder.
  3. Bleed the brake system to remove any air after reinstallation of the master cylinder.
• Tools Required: Brake bleeder kit, wrench set, new brake fluid.