Opel Astra H drivers often complain of the brake pedal becoming stiff, especially during the first start of the day or in heavy traffic. This is a critical safety concern.

Main Causes

• Vacuum pump failure – No assistance to the brake booster.
• Cracked vacuum hose – Causes air leaks.
• ABS module problems – Affects pedal pressure.
• Old brake fluid – Reduces braking efficiency.

Solutions

• Test and replace faulty vacuum pump.
• Check and replace leaking vacuum hoses.
• Diagnose ABS module with an OBD scanner.
• Replace brake fluid every 2 years.