why does my Volvo XC60 First Generation (2008-2017) brake pedal feel spongy and goes to the floor

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a flat surface and engage the parking brake.
• Wear safety glasses and gloves.

2. Inspect and Repair Leaks

• Tools Required: Wrench set, brake cleaner, clean rags
• Sub-steps:
  1. Remove the wheel cover to access the brake caliper.
  2. Inspect brake lines and connections for leaks.
  3. If leaks are found, replace the damaged brake lines or fittings.
  4. Clean up any spilled brake fluid with brake cleaner and rags.

3. Bleed the Brake System

• Tools Required: Brake bleeder kit, fresh brake fluid
• Sub-steps:
  1. Fill the master cylinder reservoir with appropriate brake fluid (check owner’s manual for specifications).
  2. Start bleeding from the wheel farthest from the master cylinder (usually the rear passenger side).
  3. Connect the brake bleeder kit to the bleeder valve on the brake caliper.
  4. Open the bleeder valve and have an assistant press the brake pedal slowly.
  5. Close the bleeder valve before the pedal reaches the floor, then release the pedal.
  6. Repeat until no air bubbles are observed in the fluid.
  7. Move to the next wheel and repeat the process until all wheels are bled.
  8. Check the brake fluid level in the master cylinder and top off as needed.

4. Inspect and Replace Brake Components (if necessary)

• Tools Required: Socket set, torque wrench
• Sub-steps:
  1. If brake pads are worn, remove the wheel and brake caliper.
  2. Replace the brake pads and ensure that the brake rotor is in good condition.
  3. Reinstall the caliper and ensure all bolts are torqued to the manufacturer’s specifications.
  4. Reinstall the wheel and lower the vehicle.