Warped or grooved rotors wear out pads fast, cause brake noise and dangerous brake lock-up, and should be resurfaced or replaced. Damaged seals will cause excessive wheel bearing wear and should be replaced. This seal returns pistons to neutral position, prevents brake fluid leakage, and helps maintain piston adjustment. Damaged seals hamper piston operation. Pads remain against rotor, causing excessive pad wear, heat damage to rotor and pads, and low gas mileage from brake drag.
Damaged seals require caliper service.
A damaged piston may freeze, causing brake drag, excessive pedal effort, pad wear, or leakage. It should be replaced and the caliper should be serviced. The Dust Boot protects the caliper seal, caliper piston slide surface, and internal caliper parts. If damaged, excessive caliper-seal wear results, causing fluid leakage and damaging delicate internal parts. Damaged dust boots require caliper service.