The Peugeot 405 is a large family car manufactured by the French automaker Peugeot from 1987 to 1997. Its production continued under license from outside Europe in Iran by Iran Khodro Company until 2020. It was voted European Car of the Year for 1988 by the largest number of votes in the history of the contest. About 2.5 million vehicles have been sold worldwide, both in left and right drive versions, as a saloon and estate. In early 2020, the 33-year production run of the Peugeot 405 was counted as the twentieth most long-lived single generation car in history."

The D-segment is the 4th category of the European segments for passenger cars, and is described as "large cars".