my Skoda Octavia's brake pedal feels soft, what could be the problem?

Solution

1. Preparation

• Tools Required: Jack, jack stands, wheel chocks, brake fluid, brake bleeding kit, OBD-II scanner
• Park the vehicle on a level surface, engage the parking brake, and place wheel chocks behind the rear wheels.
• Gather necessary tools and parts.

2. Inspect and Top Off Brake Fluid

• Remove the master cylinder reservoir cap.
• Check the brake fluid level; if low, top off with the manufacturer-recommended brake fluid (DOT 4 or DOT 3 as specified in the owner's manual).

3. Inspect Brake Lines and Components

• Lift the vehicle using a jack and secure it with jack stands.
• Visually inspect brake lines, calipers, and wheel cylinders for any signs of leaks or damage.
• If leaks are found, proceed to replace the affected components.

4. Bleed the Brake System

• Attach a brake bleeding kit to the bleeder valve on the farthest wheel from the master cylinder (usually the right rear).
• Have an assistant press the brake pedal while you open the bleeder valve to release air and any old fluid.
• Close the valve before the pedal is released. Repeat until clear fluid without bubbles runs from the line.
• Move to the next closest wheel, following the same process, until all wheels are bled.

5. Inspect and Replace Brake Pads/Rotors (if necessary)

• Inspect brake pads for thickness; replace if worn down to the indicators.
• Examine rotors for grooves or warping; replace if necessary.
• Install new brake pads and rotors, ensuring proper alignment and torque specifications are followed.

6. Test Brake Booster

• Start the engine and pump the brake pedal several times; it should feel firm after the initial pumps.
• If it remains soft, the brake booster may be faulty and should be inspected/replaced.