Brake fluid should be changed about every two years or every 30,000 miles


Read your vehicle owners manual for
specific recommendations for you car.


There will be a small, rounded long container, probably near the back, under the hood, it will say "brake fluid" on it. The container is translucent with an easy to see full line. You won't even need to remove the cap. (Unless it is a very old vehicle.)

In the picture to the left you can see where the fluid level is. If you look close enough you can see a "max" line parallel with the fluid level, exactly what you want.


Having low brake line fluid could be a sign your brake pads are wearing thin. Every other oil change you should have your tires rotated. Have your mechanic check the pads then.

If your brake pads are in good condition and you continue to be low on fluid , there is probably a leak in the brake line that should be repaired.


The big problem with brake fluid is, over time moisture collects in it lowering the fluid boiling point as much as 100 degrees F with just 3% water contamination. This can happen in as little as 18 months.

When the fluid in the brake system boils, gas forms, causing the brake pedal to be pushed without any pressure being applied to the brakes. This is called brake fade, this seriously jeopardizes car safety and could obviously cause a serious collision.

*Once you have opened a container of braking fluid, it can easily gather moisture while sitting on the shelf. If you won't use all the fluid in a short time, discard what you don't use.

top of page

Return to car maintenance from Checking Brake Fluid Level