brake pads, check the pads to see if they are worn out...change it asap b4 the metal starts scrapin the disc, then you will have to buy new disc also. my car did the same thing...at slow speeds sometimes hi speeds, i hear this slight squeeling, and when i go in reverse, i hear the squeeling, so im almost 100 percent sure its the brake pads, til then go real easy on them..... hope this helps
kevin.....
kevin.....