How to Replace 2006 Hyundai Sonata Front Disc Brake Pads
- 1). Park the vehicle on a firm, level surface and engage the emergency brake. Partly loosen the wheel lug nuts on one of the front wheels. Raise the vehicle with a jack until the partially loosened wheel is off the ground. Support the Sonata on jack stands. Completely remove the lug nuts and pull off the wheel.
- 2). Remove the two caliper guide rod bolts. Rock the caliper back and forth a few times to force the brake pads apart then lift the caliper off the disc. Hang the caliper out of the way on a wire hook or bungee cord. Be careful not to damage the flexible brake hose.
- 3). Slide the brake pads and shims out of the caliper.
- 4). Push the caliper piston back into the cylinder using a brake piston retractor. Place the retractor's metal plate against the inner surface of the outer caliper frame and place the retractor's spindle swivel on the piston face. Turn the retractor's spindle knob or handle clockwise to advance the spindle and force the piston back into the cylinder bore. Take care not to pinch the rubber piston boot seal.
- 5). Measure the thickness of the brake pad linings with a brake disc micrometer. The shop manual specifies a minimum lining thickness of .12 of an inch. If the lining thickness is less than the specified minimum, or if the linings are damaged or unevenly worn, replace the pads.
- 6). Inspect the disc braking surfaces for cracks or deep scoring. If the disc is damaged, it should be removed from the vehicle and refurbished or replaced.
- 7). Repeat the steps in reverse order to reassemble the brake with new shims and new pads if necessary. Coat the caliper guide rod bolts with brake grease before reinstalling them in the caliper mounts. Start the vehicle and test the brake operation. Remount the wheel and lower the vehicle with the jack. Repeat the operation for the other front wheel to complete the job.