What are the symptoms of a faulty brake master cylinder?

7 Symptoms of a Bad Brake Master Cylinder (and Replacement Cost)

  • Warning Light.
  • Brake Fluid Leak.
  • Spongy Brake Pedal.
  • Contaminated Brake Fluid.
  • Sinking Brake Pedal.
  • Bad Brake Bias.
  • Uneven Brake Pad Wear.
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    How do you troubleshoot a brake master cylinder? (video)

    https://www.youtube.com/watch?v=1XJm5-sOyhY

    How do I know if my master cylinder is good?

    Use the Brake Pedal

    As pressure on the brake pedal mounts, check for a fluid swirl or bubbling in the brake reservoir. If that is confirmed after two or more tries, then the brake master cylinder is not functioning properly and should be replaced. via

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