- Easy to Use: Simply insert the sensor into the brake fluid, press the power button, and the result is displayed instantly on the LED indicator.
- Stay Safe: High water content in brake fluid can reduce braking performance. Prevent accidents by checking your brake fluid in seconds.
- The VDIAGTOOL Brake Fluid Tester is a reliable, practical tool for checking the condition of your vehicle's brake system. Instantly determine the water content of your brake fluid and prevent dangerous brake fade before it happens.
- Clear 5-LED Display: Results are easy to interpret — no technical knowledge required.
- Compact & One-Button Operation: Perfect for home garages and professional workshops alike. Accurate measurements and instant feedback help keep your vehicle safely on the road.
How to Use:
- Unscrew the brake fluid reservoir cap and remove the tester's protective cover.
- Dip the forked end of the tester into the brake fluid.
- Press the power button on the end of the device and hold it in the fluid for at least one second until the LED indicator lights up.
- The device automatically turns off after 15 seconds of inactivity.
- Read the LED lights to instantly check the condition of your brake fluid.
LED Indicator Guide:
- Green: Battery and fluid OK; no water detected.
- Yellow: Less than 1% water present.
- Yellow/Yellow: Approx. 2% water present.
- Yellow/Yellow/Red: Approx. 3% water present.
- Yellow/Yellow/Red/Red: At least 4% water present. Brake fluid must be replaced immediately! High risk!
- Operates on 2 x LR44 batteries (not included).
- Splash-resistant design ensures long-lasting durability.
- Always rinse and dry the sensor tip after use. If the green LED doesn't light up, replace the battery.
- Avoid skin contact with brake fluid; rinse with plenty of water if contact occurs. Never dispose of used brake fluid in the environment — it is highly polluting.




