Bollc-Fiedler Automobilwerke GmbH, commonly referred to as B.F., was a German automobile manufacturer based in Berlin. The company operated from 1922 until 1926, during which it produced a limited range of vehicles.

B.F. was notable for its innovative engine design, featuring a three-cylinder, two-stroke engine with a displacement of 1026 cc. This unique configuration placed its vehicles in the light car category. The cars produced by B.F. gained recognition for their performance, successfully competing in various races and hill climbs during their brief production run.

Despite its short existence, B.F. contributed to the automotive landscape of the early 20th century, showcasing engineering advancements in engine design.