Like the 0350 series, the 0450 series arose from the fact that the CP needed a large number of new diesel multiple units for the non-electrified routes, but could not afford to buy completely new ones. The 0400 series had been modernized a few years earlier, but as the changes only focused on the passenger compartment, there was still a need for modern technical equipment. For this reason, all 19 examples were converted into the 0450 series from 1999, whereby nothing was taken over from the old vehicles apart from the basic structure of the car bodies and the wheel sets.

With new Cummins engines, the engine power increased and at the same time the top speed was increased to 120 km/h. An electronic diagnosis system was developed, which provided the driver with important information at all times. Passengers could now enjoy individual seats, air conditioning and an electronic passenger information system. Over time, the 0450 series was also able to displace vehicles from the 0350 series, even if the latter looks visually more modern. Some are even used in intercity traffic.