The Furka-Oberalp-Bahn designated two petrol rack railcars that were delivered in 1927 as BCm 2/2. They were supposed to handle all services during low-traffic times and had a toilet and a mail compartment, while the rear cab was used as a luggage compartment. The rack drive and the adhesion drive could not be decoupled from each other. They were also referred to as BCZm 2/2 by the Railway Department.

However, the performance was not convincing, which was mainly attributed to the lack of experience with transmissions in railway vehicles with combustion engines. A maximum of one two-axle car could also be carried, which significantly increased travel times. With electrification in 1941, they became superfluous, although the first was used as a service vehicle for a while and passed to several new owners in the following decades, remaining inoperable. The other was sold to the RhB and used without rack drive until 1956.