why does my Tesla Model Y Current (2020-present) brake pedal feel spongy

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Brake Fluid

• Tools Required: Brake fluid container, funnel, clean cloth
  • a. Remove the brake fluid reservoir cap.
  • b. Check the fluid level; if low, top off with the recommended brake fluid type (DOT 3 or DOT 4 as specified).
  • c. If the fluid is contaminated or discolored, proceed to flush the system.

3. Brake System Bleeding

• Tools Required: Brake bleeder kit, clear tubing, container for old fluid
  • a. Start at the farthest brake from the master cylinder (usually the passenger rear).
  • b. Connect the tubing to the bleeder valve on the brake caliper and place the other end in the container.
  • c. Have an assistant pump the brake pedal and hold it down.
  • d. Open the bleeder valve to release air and old fluid, then close it before the pedal is released.
  • e. Repeat until clear fluid is seen, then move to the next brake in sequence (driver rear, passenger front, driver front).
  • f. Ensure the master cylinder does not run dry during the process.

4. Inspect and Replace Brake Components

• Tools Required: Socket set, torque wrench, brake pad spreader
  • a. Remove the wheel for access to the brake caliper.
  • b. Inspect the brake pads for wear; replace if thickness is below manufacturer's specification.
  • c. Check the brake rotors for scoring or uneven wear and replace if necessary.
  • d. Reassemble the brake components and torque to specified values.

5. Reassemble and Test

• Tools Required: Torque wrench
  • a. Reinstall the wheel and torque the lug nuts to the specified value.
  • b. Reconnect the negative battery terminal.
  • c. Start the vehicle and press the brake pedal to restore brake feel.