When buying a used vehicle, it is important to test drive the car on both highways and local roads to check how the brakes and engine function. The physical condition of both the interior and exterior should also be inspected closely, including looking under the hood at the engine parts. Researching the make and model online can reveal common problems experienced by other owners. A professional mechanic should inspect the car and check for potential issues with the engine or transmission. Obtaining a vehicle history report is also recommended to uncover previous accidents or ownerships.