Brake Fluid Flush Cost Calculator

Fluid + labor cost. Recommended every 2 years or 30,000 miles.

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How to use this calculator

  • Enter fluid + labor + fees.
  • Compare shop vs. DIY.

About this calculator

Brake fluid is hygroscopic — absorbs water over time. Water reduces boiling point (causing brake fade under heavy use) and corrodes lines. Recommended flush every 2 years / 30,000 miles. Most shops charge $80-150 for the service. DIY is doable with a vacuum bleeder and fresh DOT 3 or DOT 4 fluid (always match what's in the system; never mix DOT 5 silicone). Takes 30-60 minutes for a competent DIYer.

Frequently asked

How often?+
Every 2 years or 30,000 miles. Some manufacturers say "as needed" but moisture testing is more honest.
DOT 3 vs. 4 vs. 5?+
DOT 3 (older domestic, US): glycol-based. DOT 4 (most newer cars): higher boiling point. DOT 5: silicone, NOT compatible — do not mix.
Symptoms of bad brake fluid?+
Spongy pedal, longer stopping, dark/discolored fluid in reservoir. Brake fade on long descents.
Can I top off without flushing?+
For low fluid: yes, top off. But contaminated fluid still circulates — flush sooner.
Why moisture is bad?+
Water boils at 212°F. Brake fluid 's boiling point drops with water content. Heavy braking → boiling fluid → no brakes.

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