my Skoda Octavia NFL (2020-Present) brakes feel spongy, what should I check?

Solution

1. Preparation

• Tools Required: Socket set, brake fluid, rag, container for draining fluid.
• Ensure the vehicle is parked on a level surface and secure it with wheel chocks.
• Disconnect the battery to prevent any electrical issues while working on the braking system.

2. Check Brake Fluid

• Remove the master cylinder reservoir cap and inspect the brake fluid level.
• If low, add the recommended brake fluid (DOT 4) and check for contamination (cloudy or dark fluid).
• If contaminated, proceed to drain and replace the fluid.

3. Inspect Brake Lines and Components

• Visually inspect all brake lines for cracks, corrosion, or leaks.
• Tighten any loose connections found during inspection.
• If leaks are found, replace the affected line or component.

4. Brake Pad and Rotor Inspection

• Remove the wheel to access the brake assembly.
• Check brake pads for wear; replace if the thickness is below the manufacturer’s specification (usually 3 mm).
• Inspect the rotors for scoring or warping; replace if necessary.
• Clean the rotor surface with brake cleaner if any debris is present.

5. Test Brake Booster

• With the engine running, pump the brake pedal several times and then hold it down.
• If the pedal sinks gradually, the brake booster may be faulty and require replacement.

6. Bleed the Brakes

• Tools Required: Brake bleeder kit or clear tubing, container for old fluid.
• Starting from the farthest wheel from the master cylinder (usually right rear), open the bleed valve and pump the brake pedal until clear fluid without air bubbles flows through.
• Repeat this process for each wheel in the order: right rear, left rear, right front, left front.
• Ensure the master cylinder reservoir does not run dry during the bleeding process.