Certified Pre-Owned? A Certified Pre-Owned car is one which has been put through a rigorous series of checks and tests in accordance with a set of criteria outlined by the manufacturer. If the vehicle fails on any part of the criteria, it is repaired so that it meets the required standards. These repairs are carried out with genuine MG parts, ensuring the ongoing quality, performance and safety of the car. In essence, when buying a Certified Pre-Owned model, you’re investing in a vehicle that’s as good as new, and comes covered by a comprehensive warranty.