my Toyota Corolla E170 (2013-2019) has brake fluid leaking, what could be wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and secure it with wheel chocks.
• Disconnect the battery to avoid any electrical issues.

2. Locate the Leak

• Sub-steps:
  • Clean the area around the brake fluid reservoir and system components.
  • Use a flashlight to inspect all connections and components for fluid traces.
• Tools Required: Flashlight, cleaning cloth

3. Repair or Replace Damaged Components

• Sub-steps:
  • If the brake fluid reservoir is cracked, replace it with a new one.
  • If brake lines are corroded or leaking, cut out the damaged section and replace it with new brake line tubing, ensuring to flare the ends properly.
  • For leaking calipers or wheel cylinders, remove the affected unit, replace the seals or the entire component as necessary.
  • If the master cylinder is leaking, remove it from the vehicle and replace it with a new unit, ensuring all fittings are tight.
• Tools Required: Wrench set, flare tool, brake line tubing, new brake pads (if calipers are replaced), torque wrench

4. Refill and Bleed the Brake System

• Sub-steps:
  • Refill the brake fluid reservoir with the manufacturer-recommended brake fluid (DOT 3 or DOT 4).
  • Bleed the brakes to remove any air trapped in the system, starting from the wheel farthest from the master cylinder.
  • Ensure that fluid levels are maintained and check for any air bubbles.