I have a Toyota Ist that i bought 4 months ago. The problem I have is the noise whenever I use the car brakes. I have taken the car severally to different mechanics (at least 5 times!!) and I am at my wits end. I even changed the break pads and bought new ones. Each mechanic I go to says there is nothing with the brake disk or break pads. What then could be causing the loud screeching noise? Can an ABS problem do this?

Well, when I have a screeching problem, I try to use Wagner Thermoquiet brake pads that have the shim built in, instead of standard ones.

They seem to stop more quietly than other brands.

The technicians that say that there is nothing wrong are probably just measuring the thickness of the brake discs, and the thickness of the brake pads, and maybe look at the surface of the brake discs for glazing, and don't want to replace parts unnecessarily.

So, I would ask them about this problem and see if they can install the Thermoquiet Wagner brake pads to rectify the problem.

ABS has more to do with pulsing 5 to 6 times a second when trying to come to a halt to avoid locking the brakes. I don't think that it is the cause of your screeching sound coming from the front.