You can learn how to check essential fluids in a car by ... that the brake fluid level is low and there are no external leaks, the brake fluid may be leaking into the vacuum booster.

Ford Motor Company is recalling several car models in the United States ... was issued across six vehicles as “the brake ...

Owners should bring their vehicle to their respective dealer and have them replace the brake master cylinder, if necessary. A leaky unit will also require the brake booster to be replaced.