Fixing a leak with your brake fluid can be done by any mechanically inclined do-it-yourselfer. If you have never done repairs on your car before, you will need to first sit down and review the information about your car. It is a good idea to go to your local automotive parts store and ask if they have diagrams regarding the braking system and how it works. Do not attempt to fix the lines or the fluid leak if you have not done your proper homework. Once you have reviewed material and spoken to different people, you can use the following directions as your guide to fixing any leaks.