Brake Fiuld
 

My car the brake fiuld was low. Do you think the low fiuld caused problem? I heard it making noisy when I stopping.

Can you help it out?

What kind of noisy? Squeal?

Low fluid levels shouldn't make noises, they should make it a little harder to brake properly. If it's making odd noises it's probably time for a brake job.

probably the pads and shoes are so worn they are touching the metal.

Also, sometimes it's possible, if the pads are worn down enough, for the piston to not retract far enough back into the caliper and make it appear as though you've got less fluid. But again, brake job.