Brake fluid absorbs moisture over time and turns darker. But how dark is too dark.  When the fluid absorbs too much moisture it lowers the boiling point. Since brake components get really hot, you definitely do not want your fluid to boil and become a gas. This could be catastrophic. See the chart below to see the difference between new brake fluid and 

 Know for sure when to replace your brake fluid when it reaches a point with too much moisture (3% or more) with our electronic tester. Get yours today and proceed with confidence.