During the mid-1990s, NSB had initiated a program to replace the traditional locomotive and carriage trains with new, tilting multiple units. This had led to the order of sixteen Class 73 four-car units for the three mainline routes on the Bergen Line, Dovre Line and Sørland Line. To supplement this, the board of NSB decided on 14 November 1996 to purchase seven tilting diesel multiple units for the Røros and Rauma Lines. The choice fell on Class 93, with fifteen units eventually delivered. This allowed all passenger trains on diselized lines to either be operated with Class 93 be hauled by the Di 4. The last Di 3-hauled train ran on 7 January 2001.