my Volkswagen Golf MK7.5 (2020-Present) has a hard brake pedal what to do

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface, and set the parking brake.
• Wear safety glasses and gloves.

2. Check Brake Fluid

• Open the hood and locate the brake fluid reservoir.
• Remove the cap and inspect the fluid level. If low, top off with the manufacturer-recommended brake fluid (DOT 4).
• If fluid is contaminated, proceed to a brake fluid flush.

3. Inspect and Replace Vacuum Line

• Trace the vacuum line from the engine to the brake booster.
• Check for any visible damage or signs of wear.
• If damaged, disconnect the old vacuum line using pliers, and install the new line securely.
• Ensure all connections are tight to prevent vacuum leaks.

4. Test and Replace Brake Booster (if necessary)

• If vacuum line and fluid are fine, and the hard pedal persists, the brake booster may be faulty.
• Remove the master cylinder from the brake booster by loosening the mounting bolts and disconnecting the brake lines (use a line wrench).
• Unbolt the brake booster from the firewall and disconnect the vacuum line.
• Install the new brake booster by reversing the removal steps, ensuring proper torque specifications (typically 18-24 Nm) for the mounting bolts.