my brake pedal feels spongy in my Toyota RAV4, what's going on?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a level surface and secure with wheel chocks.
• Wear gloves and safety glasses for protection.

2. Inspect and Replace Brake Fluid

1. Remove the Brake Fluid Reservoir Cap

   • Tools Required: Screwdriver (if applicable)
   • Carefully remove the cap to avoid contamination.

2. Check Fluid Condition and Level

   • If the fluid is dark or below the minimum line, it needs to be replaced.

3. Flush the Brake System

   • Connect a brake bleeder kit to the brake caliper.
   • Open the bleeder valve and pump the brake pedal until clean fluid flows out.
   • Close the valve and repeat for each wheel.

3. Inspect Brake Lines and Components

1. Visual Inspection of Lines

   • Check for cracks, corrosion, or leaks in brake lines.
   • Replace any damaged lines.

2. Inspect Brake Pads and Rotors

   • Remove wheel and caliper to access pads and rotors.
   • Measure thickness of pads and check rotor surface for warping.
   • Replace pads if worn below specification (typically 3mm) and resurface or replace rotors as needed.

4. Bleed the Brake System

1. Bleed Each Brake Line
   • Start with the wheel farthest from the master cylinder (usually the passenger rear).
   • Open the bleeder valve, have an assistant pump the brake pedal, and hold it down.
   • Close the valve before the pedal is released.
   • Repeat until no air bubbles appear, then move to the next wheel.

5. Final Assembly

• Reinstall wheels and lower the vehicle.
• Check brake fluid level and top off if necessary.
• Replace the reservoir cap securely.