The brakes are interpreted as the symbol who tells what to do in certain situation. The one that are working properly, indicates your attitude towards some situation or life overall. You do know how to act and when to stop doing whatever you are doing. The brakes that are broken or do not work the way they supposed to work, foretells about something in your life you are unable to handle. Perhaps you should stop being worried and simply find the solution for it. The broken brakes could also be interpreted as the suggestion to check the brakes on your real vehicle.
Read more about dreaming of Brakes in other dream meanings interpretations.