One of the pre-World War IIBMW factories was located in Eisenach, which after the war was taken over by the Soviets, since Eisenach was situated in the Soviet occupation zone. The factory continued producing cars and motorcycles under the BMW brand, but after a lawsuit in 1952 they had to change the name to EMW instead. The logotype was also similar, but instead of the blue BMW used, EMW used red.
Although World Championship races held in 1952 and 1953 were run to Formula Two regulations, constructors who only participated during this period are included herein to maintain Championship continuity. Constructors whose only participation in the World Championship was in the Indianapolis 500 races between 1950 and 1960 are not listed.