The story
In 1921 the company purchased Automobilwerk Eisenach, thereby entering automobile production and, with the Dixi 3/15 DA-1 playing an important part in expanding the German auto-market to buyers who hitherto would have ridden motorcycles, if at all. The company encountered a cash crisis in 1928 and the Dixi branded auto-business was sold to BMW: the Dixi 3/15 DA-1 was rebadged in 1928 as the BMW 3/15 DA-2, the name by which today the little car is better remembered.
In 1924 the Cyklon Maschinenfabrik, a manufacturer that had concentrated on motor-bikes and cycle cars came to be merged into the larger Gothaer Waggonfabrik business, through a rather indirect route of company purchases and sales. This gave Cyklon access to the viable sales and distribution network of Dixi and aspirations to become a serious auto-producer. Between 1927 and 1929 the company produced the Cyklon 9/40 which at the time was the most inexpensive six cylinder powered car sold in Germany. The conservative looking car featured a modern all-steel body produced by Germany's leading producer of steel car bodies, Ambi-Budd's Berlin based business. It was, in fact, the first all-steel standard car body produced by Ambi-Budd in Berlin and, incongruously to some modern readers, was shared with the Adler Standard 6, a more powerful and higher priced six cylinder car from one of Germany's mainstream auto-makers of the 1930s. The sale by Gothaer Waggonfabrik of the cash-strapped Dixi business to BMW meant an end to Cyklon's access to a sales network, and highlighted the lack of cash for running the auto-business which rapidly fizzled out after 1928, although Cyklon was not formally wound up until 1931.
From Wikipedia’s article on Gothaer Waggonfabrik, shared under CC BY-SA 4.0.4