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Brake booster problem?
A vibrating brake pedal is an indication of a warped rotor. Noise is common to disk brakes but depending on the noise it can mean that the brake pads are worn out and you are due for a brake job.
you most likely have low brake fluid or if it stops fine its just an annoying noise
Sounds like you have a problem with your brake light switch under the dash, mounted on your brake pedal metal arm assembly. I know if I get my head down near the brake pedal and push the pedal with my hand I can hear a loud click noise when the brake lights come on. I'm not a mechanic, but I've wondered if the brake fluid level is down in the master cylinder, does the brake pedal drop enough for the brake light switch to turn on the brake lights ?
If you are not losing brake fluid I would say the master cylinder is bad. Can you tell what direction the occasional noise is coming from?
Do you mean when you push the pedal " hard " you hear noise..........if so could be the ABS..........if not, then please have your brakes checked for safety.
Sounds like the power brake booster is bad. Get it checked out.
It sounds like a problem with your brake light switch that is mounted on the metal arm of your brake pedal under your dash. I'm not a mechanic but I've wondered if the brake fluid level is low in the master cylinder in the engine compartment, does that allow the brake pedal to drop enough to allow the switch to turn on the brake lights ? I know that if I get my head down near the brake pedal, and push the pedal with my hand I can hear a loud click noise when the brake lights come on.
You at least need to take care of the brakes right away. The grinding probably means that the disk brake pad(s) are worn. The irregular braking action is caused by a warped rotor. The brake job will include resurfacing or replacing the rotor and should eliminate the problem. As for the turbin-like noise, I'd have to hear it.
have your brake rotors turned on a lathe, or replace them with new ones.
Your brake booster is malfunctioning
Air trapped in the brake lines. Bleed your brakes and that will solve the problem.