What to look for when looking at brakes?
What to look for when looking at brakes? Observe the brake pad. Look at it to determine its thickness. If it seems very thin, less than ¼ inch, it is likely in need of replacement, according to J.D. Power. Some brake pads have a slot in the center that serves as a wear indicator. Look at the slot — if it's almost gone, the pad probably needs to replaced. What causes a knocking sound when you brake? A knocking noise when braking (or during less noticeable maneuvers) can be attributed to worn front suspension parts - especially control arm bushings....