Car Basics

Brake Fluid: What You Need to Know

This often-overlooked fluid is critical to your stopping power.

3 min read3 sections

1Why Brake Fluid Matters

Brake fluid transfers force from your pedal to the brakes. Old or contaminated fluid can boil under heavy braking, causing brake fade or failure.

2Checking the Level

Find the brake fluid reservoir (usually near the firewall, marked with a brake symbol). Fluid should be between MIN and MAX. Low fluid often indicates worn brake pads or a leak.

3When to Replace

Brake fluid absorbs moisture over time, lowering its boiling point. Most manufacturers recommend replacement every 2-3 years regardless of mileage.

Key Takeaways

  • 1Low fluid = check brake pads or for leaks
  • 2Replace every 2-3 years
  • 3Use only specified DOT rating
  • 4Keep the cap sealed when not checking

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