The brake caliper holder is part of the disc brake system. It's a bracket that holds the brake caliper in the correct position. The caliper contains the piston or pistons and brake pads through which the spinning brake disc is slowed and subsequently the vehicle.
A brake caliper holder is located behind each wheel of the vehicle. The bracket is attached by a series of bolts and holds the caliper in position.
Due to the high energy friction forces, heat and stresses involved with the braking system in the area of the discs and wheels, it's of the utmost importance that all components are in good order.
The brake caliper holder is normally a substantial cast metal bracket moulded to snug fit the caliper and should be checked for cracks during brake servicing. When replacing this part with the brake caliper holder you can be certain of a part that will be compatible with the make and model of your vehicle.