The 3/15 DA-3 Wartburg was a sports roadster version of the 3/15, and was consequently BMW's first sports car. A drop-centre front axle was used to lower the frame for a lower centre of gravity. The compression ratio of the engine was raised from 5.6:1 to 7.0:1, raising maximum output to 18 bhp (13 kW; 18 PS) at 3500 rpm.
Despite sharing the wheelbase and track of the other models, the Wartburg bodied roadster was 100 mm (3.9 in) longer, 125 mm (4.9 in) narrower and at a height of just 1,300 mm (51 in), 325 mm (12.8 in) lower than the standard bodied DA-2 and DA-4 cars.
The Wartburg was introduced in 1930, and the Great Depression had drastically reduced the market for sports cars. It was discontinued in 1931, with 150 sold.
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