Q: How to replace the caliper on the Nissan Xterra's brake system?A: Loosen the wheel lug nuts, raise the vehicle and place it securely on jackstands. Block the wheels at the opposite end. Remove the wheel. Remove the inlet fitting bolt and disconnect the brake hose from the caliper, discarding the old sealing washers and plugging the brake hose immediately. Remove the caliper mounting bolts and detach the caliper from the mounting bracket. Installation is the reverse of removal, using new sealing washers on each side of the brake hose inlet fitting and tightening the fitting bolt and the caliper mounting bolts to the torque values. Bleed the brake system and test the brakes carefully before returning the vehicle to normal service.