Great question! It’s definitely a car part you don’t hear much about.
Calipers are part of your car’s brake system. In simple terms, it’s a clamp fitted to the tire’s rotor. Inside each caliper you’ll find the brake pads for that wheel. When you step on the brake, the caliper clamps down on the brake pads, which creates friction with the rotor, gradually slowing bringing the car to a stop.
Calipers need to be replaced since they wear out with regular use. Whether they’re rusty, dirty, or the hinges have weakened, don’t be worried about this being a pointless repair! Since this is an essential part of your braking system, it’s best to go with your mechanic’s recommendation and replace the calipers sooner than later.