02/17/2026
Let's have a quick discussion on the importance of installing brake pads in the correct orientation. Generally speaking, it's self explanatory which brake pad goes on the inside vs the outside of the rotor. However, in some cases, the difference may not be obvious, especially to a DIY person.
I recently replaced rear brakes on a 2013 Ford Escape. It originally came in for a wheel bearing. During the wheel bearing removal process, I noticed it was abnormally difficult to remove the brake caliper. This can happen when the rotor develops a deep lip at its outer edge from normal wear. However, that was not the case. Once the caliper was removed, the cause was immediately recognized. The brake pads had been installed in the incorrect orientation. The inner pad was installed in the outer location and vice-versa. This creates some problems.
If you look at the first picture, you will see little metal nubs inside the circles. If you look at the second picture, you will see two holes inside the circles. That second picture is the brake caliper piston. Those holes are used in conjunction with a special tool to screw the piston back into the caliper. Those holes do not align with the metal nubs in the lower brake pad seen in the first picture. The upper pads nubs are spaced further apart and set horizontally so not to interfere with the piston pushing against the pad. The lower pads nubs are closer together and spaced vertically as to not interfere with the out portion of the caliper.
When these pads are installed incorrectly, you get damage to the caliper piston and uneven pressure applied to the brake pads as seen in the last picture. Did this create any noticeable loss in brake performance? I doubt it. Is what it did cause was the premature replacement of the brakes because of the uneven wear. The damage to the holes in the caliper piston was almost severe enough as to prevent the special tool from fitting, which would have required the calipers to be replaced as well.
So, the takeaway, especially for any diyer, make sure you orient the brake pads correctly.