To replace a bathroom sink faucet with a new model or design, turn off the water supply and remove the old faucet. Install the new model by following the manufacturer's guidelines, ensuring proper connection to the water lines, and securing the faucet. Check for leaks and proper operation before completing the installation.

Replacing a faucet with a new model or design involves installation and connection. Benefits include updated appearance and functionality. Challenges include ensuring a proper fit and avoiding leaks. Effective replacement refreshes the bathroom's look and performance.