why does my Ford Mustang S550 (2015-2023) brake pedal feel soft and spongy

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent any electrical issues during repair.

2. Inspect and Top Off Brake Fluid

• Sub-steps:
  • Remove the master cylinder cap and inspect brake fluid level.
  • If low, add the recommended brake fluid type (DOT 3 or DOT 4).
  • Replace the cap securely after adding fluid.

3. Bleed the Brake System

• Tools Required: Brake bleeder kit, wrench, clear tubing.
• Sub-steps:
  • Start at the wheel farthest from the master cylinder (usually the rear passenger side).
  • Attach the clear tubing to the bleeder valve on the brake caliper.
  • Have an assistant press the brake pedal while you open the bleeder valve to let air and fluid escape until no bubbles are seen.
  • Close the bleeder valve and repeat for the remaining wheels (rear driver side, front passenger side, front driver side).
  • Check brake fluid level frequently and top off as needed.

4. Inspect and Repair Brake Components

• Sub-steps:
  • Inspect brake pads and rotors for wear. Replace if thickness is below specifications (usually 3mm for pads).
  • Check brake hoses for cracks or damage and replace if necessary.
  • If the master cylinder is leaking, replace it with a new unit.

5. Reinstall Components and Test

• Sub-steps:
  • Reattach any components removed during inspection.
  • Reconnect the battery.
  • Start the vehicle and press the brake pedal several times to build pressure.
  • Test drive the vehicle to ensure brakes feel firm and responsive.