It's weird to think about it but your car is held together by a bunch of screws, nuts, and bolts. They are often not thought about in a way that makes them specific to the car but they are often just as important as the more major components of the car. The disc brake caliper bolt is one such part that is not even noticed until it is gone. This part is small and there are a couple of them on the car but you rarely ever hear about them. They hold the brake caliper and caliper bracket onto the car. Since the caliper experiences a lot of stress and movement, it is common for these to break or wear out over time. They can also become rusty from water or damaged by dirt getting caught in them. The caliper is found on disc brake cars and is the housing where the pads and pistons are kept. They squeeze against the rotor when the brakes are applied so it is important to have a caliper functioning properly. When the disc brake caliper bolt brakes it can cause a rattling sound or vibrations coming from that wheel and can affect the braking performance on the car.
Early cars always had drum brakes that did not have a caliper because there was a shoe in place of the pads. Disc brakes started to appear just after World War II and became more common on the front of cars during the 1970s. By the 1990s, virtually every car and truck now uses disc brakes which mean that they all have calipers. That means that they all have disc brake caliper bolts. There are usually two per wheel and they are made from metal. They may thread in and be held by a nut. They also sometimes come in different colors from black and grey to more noticeable gold and chrome silver. The disc brake caliper bolts may be able to be seen through the wheel which makes them something to show off on the car.
Replacing the disc brake caliper bolts is a relatively simple job. It is usually done in conjunction with replacing the calipers themselves or an entire brake job replacing most of the parts. Here are some basic instructions.