why does my Tesla Model 3 Highland (2024-present) brake pedal feel soft and go to the floor

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and secured with wheel chocks.
• Disconnect the 12V battery to prevent electrical issues.

2. Inspect Brake Fluid System

• Sub-steps:
  • Remove the brake fluid reservoir cap and inspect fluid level; top off with manufacturer-recommended brake fluid (DOT 3 or DOT 4).
  • Check for contamination in the fluid; if dirty, a brake fluid flush may be necessary.
• Tools Required: Brake fluid, funnel.

3. Address Leaks

• Sub-steps:
  • Visually inspect brake lines, hoses, and calipers for leaks. Replace any damaged lines or components.
  • Tighten any loose fittings and connections.
• Tools Required: Wrench set, replacement brake lines or components as needed.

4. Replace Brake Pads and Rotors (if necessary)

• Sub-steps:
  • Remove the wheel to access the brake components.
  • Unbolt the caliper and hang it using a wire (do not let it dangle from the brake line).
  • Remove the old brake pads and inspect the rotors for wear; replace rotors if they are below the minimum thickness.
  • Install new brake pads and reassemble the caliper.
• Tools Required: Socket set, torque wrench.
• Safety Warnings: Ensure the vehicle is securely supported on jack stands.

5. Check Brake Booster

• Sub-steps:
  • Inspect the vacuum line connected to the brake booster for damage or disconnection.
  • Test the booster by pressing the brake pedal several times with the engine off; it should feel firm. Then start the engine; the pedal should depress slightly.
• Tools Required: None specifically, but a vacuum gauge can be helpful.

6. Final Assembly and Testing

• Sub-steps:
  • Reconnect the battery and bleed the brake system to remove any air.
  • Test drive the vehicle at low speeds to ensure proper brake function.
• Tools Required: Brake bleeder kit.