A week or two ago I was foolin with my tires and stuff and notices that on the back of my rotor (front rotors) there are several parts (in perfect circles) grinded out. Checked the other side and there were a couple in diff spots. Now it could be from dirt, rocks, etc getting caught in the pad and wearin it down, but has anyone had this problem before? I may have been drivin on it for a long time cause i have no clue what the first owner did to the car, but the braking is not affected majorly (or so i think). So now i have to take off the rotor and hope there's enough left to grind it down.

 

Sounds weird. We need a pic.

 

aight, i'll crawl under and take one, pry be up within the day

 

here's some pics

 

Hey, are you sure those arn't the rivets holding your pads on? If you run your pads all the way down to the rivets, they will cut into the rotor like that. Also, the inside pad can wear out faster then the outside one because the initial pressure is applyed to the inside pad. If someone else (the person who owned the car before you) had run the pad all the way down, could have scored the rotor, and then, being cheap or not caring, didn't turn/replace the rotor, just replaced the pads.
Also, on my work truck I have had a rock get under there and put a nice little gouge in the rotor, but that is because I take my work truck off road all the time. The jobsites I am on are really rough terrain and I have only had 1 rock at 1 time do this to my rotors. I wouldn't put money on rocks in the rotor, but that is just my opinion.

 

I'd bet money your pads are worn out

 

Yes, that is just advanced wear. Regardless of the pad condition those rotors are toast.

If there is sufficient pad material (check all 4 pads) then the brakes are not dangerous, and servicing is to some degree optional. However I expect you should feel a rather large amount of brake pulsing and squeal.

The proper thing to do would to be to go ahead with a full brake service including new rotors and pads. Rotors for our cars are not very costly and the brake service in general is very simple.

You should check the rear brakes for a similar condition.

 

Looks like scoring...

 

The pitting is "normal" for inexpensive rotors. I've seen many like that.

The grooves, are a boo boo . . .

 

Rotors are gone. Pads are gone. Time to invest(spend) $$$ on both!!!