1. Park the car on a level surface, engage the parking brake, and turn off the engine.
2. Locate the lug nuts on the front wheels and loosen them with a lug wrench, but do not remove them completely.
3. Use a jack and jack stands to safely raise the front of the car until the tires are off the ground.
4. Once the tires are off the ground, remove the lug nuts and take off the front wheels.
5. Locate the brake calipers. There will be a bolt on the back of each caliper. Use a wrench to loosen and remove the bolts, taking care not to lose any of the washers or clips that may be on the bolts.
6. Once the bolts are removed, you can remove the calipers by gently prying them off the brake rotors.
7. Inspect the brake pads. If they are worn down to less than 1/4 inch thick, they need to be replaced.
8. To replace the brake pads, simply slide the old pads out of the caliper and slide the new pads into place. Make sure the new pads are seated correctly and that the wear indicators are not touching the rotors.
9. Reattach the calipers and tighten the bolts until they are snug.
10. Replace the wheels and lug nuts, then lower the car using the jack and jack stands.
11. Pump the brake pedal a few times to ensure that the new pads are properly seated.
It's important to ensure that all safety precautions are taken when performing this task. It is also advisable to refer to the vehicle's service manual for specific instructions and specifications related to your 2006 Civic SI.