my Volvo XC90's brake pedal feels spongy what should I check

Solution

1. Preparation

• Gather tools: Brake fluid, wrench set, brake bleeder kit, jack and jack stands, and safety glasses.
• Ensure the vehicle is parked on a flat surface and the engine is off.

2. Inspect Brake Fluid Level

• Open the hood and locate the master cylinder.
• Remove the cap and check the brake fluid level.
• If low, add the recommended type of brake fluid (DOT 4 for most Volvo models).

3. Check for Leaks

• Examine all brake lines, hoses, and connections for signs of fluid leaks.
• If leaks are found, replace the damaged components.

4. Bleed the Brake System

• Start with the wheel farthest from the master cylinder (usually the right rear).
• Use a brake bleeder kit to attach to the bleeder valve on the caliper.
• Have an assistant pump the brake pedal several times, then hold it down.
• Open the bleeder valve to release air and fluid, then close it before the pedal is released.
• Repeat until no air bubbles are seen in the fluid.
• Move to the next wheel (left rear, right front, left front) and repeat the process.

5. Inspect Brake Components

• Remove the wheel to access the brake calipers and pads.
• Check the brake pads for adequate thickness and the rotors for scoring or warping.
• Replace worn pads or damaged rotors as necessary.