In a disc brake system, the brake fluid level will become lower due to normal wear on the pads. Often an indicator that pads are worn is that the low brake flui

In a disc brake system, the brake fluid level will become lower due to normal wear on the pads. Often an indicator that pads are worn is that the low brake fluid warning light will illuminate on the dashboard. If you top up the fluid at that point, everything will seem normal, but the pads will continue to wear until the friction material is entirely gone. Sinking pedal while stopped can also be caused by leaking seals in the master cylinder. So yes, low fluid level is either an indication of pad wear or a leak, it's not a normal condition and if you don't know the cause, you should take it to a shop that can check it out.