my Skoda Octavia NFL (2020-Present) has a hard brake pedal feel what's wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Brake Booster

1. Remove the Brake Booster:

   • Disconnect the vacuum hose from the brake booster.
   • Unbolt the brake booster from the firewall using a socket set.
   • Carefully pull the brake booster out of the engine bay.

2. Inspect the Brake Booster:

   • Check for any cracks or damage to the booster.
   • Use a vacuum gauge to test the booster; a reading below 18 inHg indicates a fault.

3. Replace the Brake Booster:

   • If damaged, install a new brake booster by reversing the removal steps.
   • Ensure the vacuum line is securely connected to the new booster.

3. Brake Fluid Inspection and Replacement

1. Check Brake Fluid:

   • Remove the master cylinder cap and check the fluid level.
   • If low, fill with the manufacturer-recommended brake fluid (DOT 4).

2. Bleed the Brake System:

   • Using a brake bleeder kit, bleed the brakes starting from the furthest caliper from the master cylinder to the closest.
   • Ensure no air bubbles are present in the system.

4. Reconnect and Test

• Reconnect the negative battery terminal.
• Start the engine and press the brake pedal several times to restore brake assist.
• Check for any leaks at the booster and master cylinder.