Brake Fluid Tester

Sale price Price $12.99 USD Regular price $19.99 USD



  1. Check the car brake oil quality

   2. 5 LED lights display the percentage of moisture content in brake fluid,how the test results more accurate

   3. Press the button for power on, green LED will light up.

   4. Insert the tester into reservoir for a second , then the results will be indicated correctly by LEDs.

   5. Testing DOT 3, DOT4, DOT5 brake fluid

   6. Auto power off,Supports 1 LR03 AAA batteries (not included)


Brake fluid detection pen is based on the change in conductivity to determine the moisture change brake fluid. It shows clearly the extent of moisture contained by the light-emitting diode, high moisture content will lead to lower boiling point, affect braking performance. Red indicates the brake fluid needs immediate replacement, green represents good condition, yellow indicates the state is acceptable but soon replaced.

LED Indicator Display:

   1. The green LED lights = water content in the brake fluid H2O <1.5%, brake fluid qualified

   2. The yellow LED lights = brake fluid water content H2O = 1.5% to 3%, can continue to use, test again six months later

   3. The red LED lights = water content in the brake fluid H2O> 3%, can not continue to use the brake fluid needs to be replaced

   Red LED: change brake fluid

   4. LED red flashing: battery replacement

   5. LED yellow: low moisture content, check again in six months

   6. LED green: brake fluid lines / cell row

Technical parameters:

   Green: Battery OK, that is, brake fluid does not contain water

   Green / yellow: brake oil in water content of less than 1%, good performance.

   Green / yellow / yellow: brake oil in water content of about 2%, brake fluid ok.

   Green / yellow / yellow / red: brake oil in water content of about 3%, replace brake fluid.

   Green / yellow / yellow / red / red: brake oil in water content of at least 4%, the brake fluid must be replaced immediately.


    • Shipping Worldwide
    • The product gets shipped out within 2-3 days 
    • Due to super HIGH DEMAND, Please allow 2-3 weeks for delivery!