my Volkswagen Golf MK7.5 (2020-Present) has a hard brake pedal what's the issue

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and engage the parking brake.
• Disconnect the battery to avoid any electrical issues while working on the brake system.

2. Inspect and Replace Brake Booster

• Sub-steps:
  1. Remove the engine cover (if applicable) to access the brake booster.
  2. Disconnect the vacuum line from the brake booster.
  3. Unbolt the brake booster from the firewall using a socket set (typically 10mm).
  4. Carefully remove the brake booster from the vehicle.
  5. Inspect the rubber diaphragm for tears or wear.
  6. If defective, install a new brake booster, ensuring proper alignment.
  7. Reconnect the vacuum line securely.

Tools Required:

• Socket set
• Vacuum gauge
• Screwdrivers
• Torque wrench

3. Brake Fluid and System Inspection

• Sub-steps:
  1. Check the brake fluid level; if low, top off with the appropriate DOT fluid as specified in the owner’s manual.
  2. Inspect all brake lines for cracks or leaks and replace any damaged sections.
  3. Bleed the brake system to remove any air that may have entered during repairs.

4. Testing

• Sub-steps:
  1. Reconnect the battery.
  2. Start the vehicle and allow it to idle; confirm that the brake booster is functioning by pressing the brake pedal – it should feel softer after the engine is running.
  3. Perform a brake test by slowly driving the vehicle and testing the brakes for responsiveness and feel.