Certified Pre-Owned (CPO) cars are essentially top-quality, inspected used cars backed by manufacturers' warranties.
You may have noticed that many vehicles formerly known as "used" are now termed "Certified Pre-Owned" or "CPO." These programs originated in the Luxury category due to the high rate of off-lease vehicles populating the market in the recent past. Because these vehicles were in great shape and had lower mileage, manufacturers took a serious interest in ensuring that they delivered a positive purchase and ownership experience. As a result, they began to "refurbish" these vehicles and add warranties and special financing.
A variety of organizations have jumped on the Certified Pre-Owned bandwagon, including dealers and several third-party suppliers.